diff --git a/tools/check_for_upgrade.sh b/tools/check_for_upgrade.sh
index d1b174c6d..3c9a4e4ca 100644
--- a/tools/check_for_upgrade.sh
+++ b/tools/check_for_upgrade.sh
@@ -60,5 +60,5 @@ then
     _update_zsh_update
   fi
 
-  rm -r $ZSH/log/update.lock
+  rmdir $ZSH/log/update.lock
 fi