diff --git a/generateCppImpl.cpp b/generateCppImpl.cpp
index 25310f5..caa0ac0 100644
--- a/generateCppImpl.cpp
+++ b/generateCppImpl.cpp
@@ -104,7 +104,7 @@
 
     Formatter out(file);
 
-    const std::string guard = makeHeaderGuard(baseName);
+    const std::string guard = makeHeaderGuard(baseName, false /* indicateGenerated */);
 
     out << "#ifndef " << guard << "\n";
     out << "#define " << guard << "\n\n";