diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3987eac9..5e5462f1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -279,5 +279,5 @@
 # Append FLATBUFFERS_CXX_FLAGS to CMAKE_CXX_FLAGS.
 if(DEFINED FLATBUFFERS_CXX_FLAGS)
   message(STATUS "extend CXX_FLAGS with ${FLATBUFFERS_CXX_FLAGS}")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${FLATBUFFERS_CXX_FLAGS}")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${FLATBUFFERS_CXX_FLAGS} -Wno-error=stringop-overflow")
 endif()
 message(STATUS "CMAKE_CXX_FLAGS: ${CMAKE_CXX_FLAGS}")
diff --git a/include/flatbuffers/flatbuffers.h b/include/flatbuffers/flatbuffers.h
index bc828a31..3d3effe8 100644
--- a/include/flatbuffers/flatbuffers.h
+++ b/include/flatbuffers/flatbuffers.h
@@ -213,7 +213,12 @@ inline const char * const *ElementaryTypeNames() {
 // We're explicitly defining the signedness since the signedness of integer
 // bitfields is otherwise implementation-defined and causes warnings on older
 // GCC compilers.
-struct TypeCode {
+
+struct
+#if defined(_AIX) && defined(__clang__)
+__attribute__((packed))
+#endif
+TypeCode {
   // ElementaryType
   unsigned short base_type : 4;
   // Either vector (in table) or array (in struct)