diff --git a/cc/library.go b/cc/library.go
index 6bd93f9..335b18e 100644
--- a/cc/library.go
+++ b/cc/library.go
@@ -1329,7 +1329,7 @@
 
 func versioningMacroName(moduleName string) string {
 	macroName := charsNotForMacro.ReplaceAllString(moduleName, "_")
-	macroName = strings.ToUpper(moduleName)
+	macroName = strings.ToUpper(macroName)
 	return "__" + macroName + "_API__"
 }