diff --git a/include/flatbuffers/stl_emulation.h b/include/flatbuffers/stl_emulation.h
index 967f297d6..1f3099146 100644
--- a/include/flatbuffers/stl_emulation.h
+++ b/include/flatbuffers/stl_emulation.h
@@ -466,7 +466,7 @@ class span FLATBUFFERS_FINAL_CLASS {
  private:
   // This is a naive implementation with 'count_' member even if (Extent != dynamic_extent).
   pointer const data_;
-  const size_type count_;
+  size_type count_;
 };
 #endif  // defined(FLATBUFFERS_USE_STD_SPAN)