diff --git a/src/engine/platform/sound/ymfm/ymfm.h b/src/engine/platform/sound/ymfm/ymfm.h
index 906e3211a..7b98f8499 100644
--- a/src/engine/platform/sound/ymfm/ymfm.h
+++ b/src/engine/platform/sound/ymfm/ymfm.h
@@ -33,7 +33,7 @@
 
 #pragma once
 
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
  #define _CRT_SECURE_NO_WARNINGS
 #endif