diff --git a/cli/cppcheckexecutor.cpp b/cli/cppcheckexecutor.cpp
index 5be9f3208..db41eaaa2 100644
--- a/cli/cppcheckexecutor.cpp
+++ b/cli/cppcheckexecutor.cpp
@@ -963,7 +963,7 @@ static inline const std::string ansiToOEM(const std::string &msg, bool doConvert
 }
 #else
 // no performance regression on non-windows systems
-#define ansiToOEM(msg, doConvert) msg
+#define ansiToOEM(msg, doConvert) (msg)
 #endif
 
 void CppCheckExecutor::reportErr(const std::string &errmsg)