diff --git a/src/google/protobuf/compiler/cpp/cpp_message.cc b/src/google/protobuf/compiler/cpp/cpp_message.cc
index be6f34810..3ebe9f036 100644
--- a/src/google/protobuf/compiler/cpp/cpp_message.cc
+++ b/src/google/protobuf/compiler/cpp/cpp_message.cc
@@ -1174,7 +1174,7 @@ void MessageGenerator::GenerateClassDefinition(io::Printer* printer) {
   if (options_.table_driven_serialization) {
     format(
         "private:\n"
-        "const void* InternalGetTable() const;\n"
+        "const void* InternalGetTable() const override;\n"
         "public:\n"
         "\n");
   }