diff --git a/include/flatbuffers/reflection.h b/include/flatbuffers/reflection.h
index f606b7b5e..1c49234fc 100644
--- a/include/flatbuffers/reflection.h
+++ b/include/flatbuffers/reflection.h
@@ -362,7 +362,6 @@ template<typename T, typename U> class pointer_inside_vector {
         reinterpret_cast<uint8_t *>(flatbuffers::vector_data(vec_)) + offset_);
   }
   T *operator->() const { return operator*(); }
-  void operator=(const pointer_inside_vector &piv);
 
  private:
   size_t offset_;
diff --git a/include/flatbuffers/reflection_generated.h b/include/flatbuffers/reflection_generated.h
index e7237ff24..cd783793c 100644
--- a/include/flatbuffers/reflection_generated.h
+++ b/include/flatbuffers/reflection_generated.h
@@ -161,7 +161,6 @@ struct TypeBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  TypeBuilder &operator=(const TypeBuilder &);
   flatbuffers::Offset<Type> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Type>(end);
@@ -225,7 +224,6 @@ struct KeyValueBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  KeyValueBuilder &operator=(const KeyValueBuilder &);
   flatbuffers::Offset<KeyValue> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<KeyValue>(end);
@@ -325,7 +323,6 @@ struct EnumValBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  EnumValBuilder &operator=(const EnumValBuilder &);
   flatbuffers::Offset<EnumVal> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<EnumVal>(end);
@@ -448,7 +445,6 @@ struct EnumBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  EnumBuilder &operator=(const EnumBuilder &);
   flatbuffers::Offset<Enum> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Enum>(end);
@@ -617,7 +613,6 @@ struct FieldBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  FieldBuilder &operator=(const FieldBuilder &);
   flatbuffers::Offset<Field> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Field>(end);
@@ -773,7 +768,6 @@ struct ObjectBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  ObjectBuilder &operator=(const ObjectBuilder &);
   flatbuffers::Offset<Object> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Object>(end);
@@ -898,7 +892,6 @@ struct RPCCallBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  RPCCallBuilder &operator=(const RPCCallBuilder &);
   flatbuffers::Offset<RPCCall> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<RPCCall>(end);
@@ -1007,7 +1000,6 @@ struct ServiceBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  ServiceBuilder &operator=(const ServiceBuilder &);
   flatbuffers::Offset<Service> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Service>(end);
@@ -1123,7 +1115,6 @@ struct SchemaBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  SchemaBuilder &operator=(const SchemaBuilder &);
   flatbuffers::Offset<Schema> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Schema>(end);
diff --git a/samples/monster_generated.h b/samples/monster_generated.h
index 4e49d5f9f..00aa70b02 100644
--- a/samples/monster_generated.h
+++ b/samples/monster_generated.h
@@ -402,7 +402,6 @@ struct MonsterBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  MonsterBuilder &operator=(const MonsterBuilder &);
   flatbuffers::Offset<Monster> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Monster>(end);
@@ -536,7 +535,6 @@ struct WeaponBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  WeaponBuilder &operator=(const WeaponBuilder &);
   flatbuffers::Offset<Weapon> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Weapon>(end);
diff --git a/src/idl_gen_cpp.cpp b/src/idl_gen_cpp.cpp
index f78ee268f..8c6e27c93 100644
--- a/src/idl_gen_cpp.cpp
+++ b/src/idl_gen_cpp.cpp
@@ -2228,11 +2228,6 @@ class CppGenerator : public BaseGenerator {
     code_ += "    start_ = fbb_.StartTable();";
     code_ += "  }";
 
-    // Assignment operator;
-    code_ +=
-        "  {{STRUCT_NAME}}Builder &operator="
-        "(const {{STRUCT_NAME}}Builder &);";
-
     // Finish() function.
     code_ += "  flatbuffers::Offset<{{STRUCT_NAME}}> Finish() {";
     code_ += "    const auto end = fbb_.EndTable(start_);";
diff --git a/src/reflection.cpp b/src/reflection.cpp
index abe9bb5d0..70267c111 100644
--- a/src/reflection.cpp
+++ b/src/reflection.cpp
@@ -296,8 +296,6 @@ class ResizeContext {
     }
   }
 
-  void operator=(const ResizeContext &rc);
-
  private:
   const reflection::Schema &schema_;
   uint8_t *startptr_;
diff --git a/tests/arrays_test_generated.h b/tests/arrays_test_generated.h
index 30e788462..66599d180 100644
--- a/tests/arrays_test_generated.h
+++ b/tests/arrays_test_generated.h
@@ -264,7 +264,6 @@ struct ArrayTableBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  ArrayTableBuilder &operator=(const ArrayTableBuilder &);
   flatbuffers::Offset<ArrayTable> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<ArrayTable>(end);
diff --git a/tests/cpp17/generated_cpp17/monster_test_generated.h b/tests/cpp17/generated_cpp17/monster_test_generated.h
index 359fd1a9b..043c21e89 100644
--- a/tests/cpp17/generated_cpp17/monster_test_generated.h
+++ b/tests/cpp17/generated_cpp17/monster_test_generated.h
@@ -642,7 +642,6 @@ struct InParentNamespaceBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  InParentNamespaceBuilder &operator=(const InParentNamespaceBuilder &);
   flatbuffers::Offset<InParentNamespace> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<InParentNamespace>(end);
@@ -695,7 +694,6 @@ struct MonsterBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  MonsterBuilder &operator=(const MonsterBuilder &);
   flatbuffers::Offset<Monster> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Monster>(end);
@@ -765,7 +763,6 @@ struct TestSimpleTableWithEnumBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  TestSimpleTableWithEnumBuilder &operator=(const TestSimpleTableWithEnumBuilder &);
   flatbuffers::Offset<TestSimpleTableWithEnum> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<TestSimpleTableWithEnum>(end);
@@ -859,7 +856,6 @@ struct StatBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  StatBuilder &operator=(const StatBuilder &);
   flatbuffers::Offset<Stat> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Stat>(end);
@@ -950,7 +946,6 @@ struct ReferrableBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  ReferrableBuilder &operator=(const ReferrableBuilder &);
   flatbuffers::Offset<Referrable> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Referrable>(end);
@@ -1686,7 +1681,6 @@ struct MonsterBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  MonsterBuilder &operator=(const MonsterBuilder &);
   flatbuffers::Offset<Monster> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Monster>(end);
@@ -2113,7 +2107,6 @@ struct TypeAliasesBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  TypeAliasesBuilder &operator=(const TypeAliasesBuilder &);
   flatbuffers::Offset<TypeAliases> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<TypeAliases>(end);
diff --git a/tests/evolution_test/evolution_v1_generated.h b/tests/evolution_test/evolution_v1_generated.h
index 1d447ffc1..25afa6935 100644
--- a/tests/evolution_test/evolution_v1_generated.h
+++ b/tests/evolution_test/evolution_v1_generated.h
@@ -152,7 +152,6 @@ struct TableABuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  TableABuilder &operator=(const TableABuilder &);
   flatbuffers::Offset<TableA> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<TableA>(end);
@@ -194,7 +193,6 @@ struct TableBBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  TableBBuilder &operator=(const TableBBuilder &);
   flatbuffers::Offset<TableB> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<TableB>(end);
@@ -326,7 +324,6 @@ struct RootBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  RootBuilder &operator=(const RootBuilder &);
   flatbuffers::Offset<Root> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Root>(end);
diff --git a/tests/evolution_test/evolution_v2_generated.h b/tests/evolution_test/evolution_v2_generated.h
index 4e1b8404d..446d9e2f8 100644
--- a/tests/evolution_test/evolution_v2_generated.h
+++ b/tests/evolution_test/evolution_v2_generated.h
@@ -176,7 +176,6 @@ struct TableABuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  TableABuilder &operator=(const TableABuilder &);
   flatbuffers::Offset<TableA> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<TableA>(end);
@@ -233,7 +232,6 @@ struct TableBBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  TableBBuilder &operator=(const TableBBuilder &);
   flatbuffers::Offset<TableB> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<TableB>(end);
@@ -282,7 +280,6 @@ struct TableCBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  TableCBuilder &operator=(const TableCBuilder &);
   flatbuffers::Offset<TableC> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<TableC>(end);
@@ -443,7 +440,6 @@ struct RootBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  RootBuilder &operator=(const RootBuilder &);
   flatbuffers::Offset<Root> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Root>(end);
diff --git a/tests/monster_extra_generated.h b/tests/monster_extra_generated.h
index 3b4ee27ad..231d6c12e 100644
--- a/tests/monster_extra_generated.h
+++ b/tests/monster_extra_generated.h
@@ -197,7 +197,6 @@ struct MonsterExtraBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  MonsterExtraBuilder &operator=(const MonsterExtraBuilder &);
   flatbuffers::Offset<MonsterExtra> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<MonsterExtra>(end);
diff --git a/tests/monster_test_generated.h b/tests/monster_test_generated.h
index ad87ffe3a..219e83576 100644
--- a/tests/monster_test_generated.h
+++ b/tests/monster_test_generated.h
@@ -802,7 +802,6 @@ struct InParentNamespaceBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  InParentNamespaceBuilder &operator=(const InParentNamespaceBuilder &);
   flatbuffers::Offset<InParentNamespace> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<InParentNamespace>(end);
@@ -858,7 +857,6 @@ struct MonsterBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  MonsterBuilder &operator=(const MonsterBuilder &);
   flatbuffers::Offset<Monster> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Monster>(end);
@@ -932,7 +930,6 @@ struct TestSimpleTableWithEnumBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  TestSimpleTableWithEnumBuilder &operator=(const TestSimpleTableWithEnumBuilder &);
   flatbuffers::Offset<TestSimpleTableWithEnum> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<TestSimpleTableWithEnum>(end);
@@ -1032,7 +1029,6 @@ struct StatBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  StatBuilder &operator=(const StatBuilder &);
   flatbuffers::Offset<Stat> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Stat>(end);
@@ -1127,7 +1123,6 @@ struct ReferrableBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  ReferrableBuilder &operator=(const ReferrableBuilder &);
   flatbuffers::Offset<Referrable> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Referrable>(end);
@@ -1911,7 +1906,6 @@ struct MonsterBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  MonsterBuilder &operator=(const MonsterBuilder &);
   flatbuffers::Offset<Monster> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Monster>(end);
@@ -2353,7 +2347,6 @@ struct TypeAliasesBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  TypeAliasesBuilder &operator=(const TypeAliasesBuilder &);
   flatbuffers::Offset<TypeAliases> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<TypeAliases>(end);
diff --git a/tests/namespace_test/namespace_test1_generated.h b/tests/namespace_test/namespace_test1_generated.h
index feae671a0..721227680 100644
--- a/tests/namespace_test/namespace_test1_generated.h
+++ b/tests/namespace_test/namespace_test1_generated.h
@@ -153,7 +153,6 @@ struct TableInNestedNSBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  TableInNestedNSBuilder &operator=(const TableInNestedNSBuilder &);
   flatbuffers::Offset<TableInNestedNS> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<TableInNestedNS>(end);
diff --git a/tests/namespace_test/namespace_test2_generated.h b/tests/namespace_test/namespace_test2_generated.h
index bb6844b88..ccb8a934c 100644
--- a/tests/namespace_test/namespace_test2_generated.h
+++ b/tests/namespace_test/namespace_test2_generated.h
@@ -138,7 +138,6 @@ struct TableInFirstNSBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  TableInFirstNSBuilder &operator=(const TableInFirstNSBuilder &);
   flatbuffers::Offset<TableInFirstNS> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<TableInFirstNS>(end);
@@ -232,7 +231,6 @@ struct TableInCBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  TableInCBuilder &operator=(const TableInCBuilder &);
   flatbuffers::Offset<TableInC> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<TableInC>(end);
@@ -310,7 +308,6 @@ struct SecondTableInABuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  SecondTableInABuilder &operator=(const SecondTableInABuilder &);
   flatbuffers::Offset<SecondTableInA> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<SecondTableInA>(end);
diff --git a/tests/native_type_test_generated.h b/tests/native_type_test_generated.h
index 911142641..d591a4e93 100644
--- a/tests/native_type_test_generated.h
+++ b/tests/native_type_test_generated.h
@@ -103,7 +103,6 @@ struct ApplicationDataBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  ApplicationDataBuilder &operator=(const ApplicationDataBuilder &);
   flatbuffers::Offset<ApplicationData> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<ApplicationData>(end);
diff --git a/tests/union_vector/union_vector_generated.h b/tests/union_vector/union_vector_generated.h
index a03f72271..f93dbf025 100644
--- a/tests/union_vector/union_vector_generated.h
+++ b/tests/union_vector/union_vector_generated.h
@@ -314,7 +314,6 @@ struct AttackerBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  AttackerBuilder &operator=(const AttackerBuilder &);
   flatbuffers::Offset<Attacker> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Attacker>(end);
@@ -439,7 +438,6 @@ struct MovieBuilder {
         : fbb_(_fbb) {
     start_ = fbb_.StartTable();
   }
-  MovieBuilder &operator=(const MovieBuilder &);
   flatbuffers::Offset<Movie> Finish() {
     const auto end = fbb_.EndTable(start_);
     auto o = flatbuffers::Offset<Movie>(end);