diff --git a/install-release.sh b/install-release.sh
index 23283f2..7fa9fc8 100755
--- a/install-release.sh
+++ b/install-release.sh
@@ -300,7 +300,7 @@ judgment_parameters() {
         N_UP_SERVICE='1'
         ;;
       '--logrotate')
-        if grep -qE '\b([01][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9]\b' <<< "$2";then
+        if ! grep -qE '\b([01][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9]\b' <<< "$2";then
           echo "error: Wrong format of time, it should be in the format of 12:34:56, under 10:00:00 should be start with 0, e.g. 01:23:45."
           exit 1
         fi