diff --git a/include/flatbuffers/base.h b/include/flatbuffers/base.h
index 5c4cae791..f576cc24c 100644
--- a/include/flatbuffers/base.h
+++ b/include/flatbuffers/base.h
@@ -155,7 +155,7 @@ namespace flatbuffers {
   #define FLATBUFFERS_FINAL_CLASS final
   #define FLATBUFFERS_OVERRIDE override
   #define FLATBUFFERS_EXPLICIT_CPP11 explicit
-  #define FLATBUFFERS_VTABLE_UNDERLYING_TYPE : flatbuffers::voffset_t
+  #define FLATBUFFERS_VTABLE_UNDERLYING_TYPE : ::flatbuffers::voffset_t
 #else
   #define FLATBUFFERS_FINAL_CLASS
   #define FLATBUFFERS_OVERRIDE