diff --git a/apps/shell/gui-shell.c b/apps/shell/gui-shell.c
index 3771538f4..19e8a5b0d 100644
--- a/apps/shell/gui-shell.c
+++ b/apps/shell/gui-shell.c
@@ -102,7 +102,7 @@ shell_prompt(char *str)
 }
 /*-----------------------------------------------------------------------------------*/
 void
-shell_exit(char *str)
+shell_exit(void)
 {
   ctk_window_close(&window);
 }