diff --git a/include/grpc++/impl/codegen/call_hook.h b/include/grpc++/impl/codegen/call_hook.h
index d5131413fb7..0b6027293a3 100644
--- a/include/grpc++/impl/codegen/call_hook.h
+++ b/include/grpc++/impl/codegen/call_hook.h
@@ -48,4 +48,4 @@ class CallHook {
 
 }  // namespace grpc
 
-#endif // GRPCXX_IMPL_CODEGEN_CALL_HOOK_H
+#endif  // GRPCXX_IMPL_CODEGEN_CALL_HOOK_H