diff --git a/src/idl_parser.cpp b/src/idl_parser.cpp
index e4d2d9421..47e44c8bd 100644
--- a/src/idl_parser.cpp
+++ b/src/idl_parser.cpp
@@ -713,6 +713,7 @@ bool Parser::Parse(const char *source) {
     while (token_ != kTokenEof) {
       if (token_ == kTokenNameSpace) {
         Next();
+        name_space_.clear();
         for (;;) {
           name_space_.push_back(attribute_);
           Expect(kTokenIdentifier);