diff --git a/source/core/raze_music.cpp b/source/core/raze_music.cpp
index 5e1743fcd..69712ea9c 100644
--- a/source/core/raze_music.cpp
+++ b/source/core/raze_music.cpp
@@ -81,7 +81,7 @@ FString G_SetupFilenameBasedMusic(const char* fn, const char* defmusic)
 		test.Format("%s.%s", name.GetChars(), ext);
 		if (FileExists(test)) return test;
 #ifdef __unix__
-		test.Format("%s.%s", name.GetChars(), FString(ext.GetChars()).MakeLower().GetChars());
+		test.Format("%s.%s", name.GetChars(), FString(ext).MakeLower().GetChars());
 		if (FileExists(test)) return test;
 #endif
 	}