diff --git a/src/gui/sdlmain.cpp b/src/gui/sdlmain.cpp
index 217caf13..7aa4aafa 100644
--- a/src/gui/sdlmain.cpp
+++ b/src/gui/sdlmain.cpp
@@ -51,7 +51,7 @@
 #include "cross.h"
 #include "control.h"
 
-#define MAPPERFILE "mapper-" VERSION ".conf"
+#define MAPPERFILE "mapper-" VERSION ".map"
 //#define DISABLE_JOYSTICK
 
 #if C_OPENGL