Index: ComboBo.c
--- ComboBo.c.orig
+++ ComboBo.c
@@ -768,5 +768,5 @@ ComboBoxSetString(fnw, dir)
     }
 
     strcpy(CurrentDir(fnw), dir);
-    ChangeDirectory(fnw, 0);
+    ChangeDirectory((ComboBoxWidget) fnw, 0);
 }
