diff --git a/pcsx2/gui/AppConfig.h b/pcsx2/gui/AppConfig.h
index 896906e4ef..aca4ce5bb8 100644
--- a/pcsx2/gui/AppConfig.h
+++ b/pcsx2/gui/AppConfig.h
@@ -206,8 +206,9 @@ public:
 	bool		Toolbar_ShowLabels;
 
 	// uses automatic ntfs compression when creating new memory cards (Win32 only)
-	// (Used in several places, so it's easier
+#ifdef __WXMSW__
 	bool		McdCompressNTFS;
+#endif
 
 	// Force-ejects modified memory cards when loading savestates (avoids corruption)
 	bool		McdEnableEjection;