diff --git a/backup.sh b/backup.sh
index 3aa0822..3073e4f 100755
--- a/backup.sh
+++ b/backup.sh
@@ -50,7 +50,7 @@ function quit {
 function checkExist {
     if [ "$1" = "ff" ]; then
         # find file
-        if [ -e "$2" ]; then
+        if [ -f "$2" ]; then
             # found
             return 0
         else