diff --git a/mint-config-update.sh b/mint-config-update.sh
index 33c3d6f..bddab0b 100644
--- a/mint-config-update.sh
+++ b/mint-config-update.sh
@@ -5,7 +5,7 @@ then
   # lockfile for systemd-service
   trap "rm -f /run/mint-config-update.sh.lock" EXIT
   echo $$ >/run/mint-config-update.sh.lock
-  if find /var/log/mint-config-update.sh.log -mmin +60 | grep -q /var/log/mint-config-update.sh.log
+  if find /var/log/mint-config-update.sh.log -mmin -60 | grep -q /var/log/mint-config-update.sh.log
   then
     echo "$0 was running already in the last 60 minutes"
     rm -f /run/mint-config-update.sh.lock