Index: libmenu/menu_filesel.c
===================================================================
--- libmenu/menu_filesel.c  (revision 24089)
+++ libmenu/menu_filesel.c  (working copy)
@@ -320,7 +320,7 @@
      if(l <= 1) break;
      mpriv->dir[l-1] = '\0';
      slash = strrchr(mpriv->dir,'/');
-#if defined(__MINGW32__) || defined(__CYGWIN__)
+#if defined(__MINGW32__) || defined(__CYGWIN__) || defined(__OS2__)
      if (!slash)
        slash = strrchr(mpriv->dir,'\\');
 #endif