diff --git a/enable-expire-notifs.sh b/enable-expire-notifs.sh
index bf16d49..ac05b48 100755
--- a/enable-expire-notifs.sh
+++ b/enable-expire-notifs.sh
@@ -19,7 +19,7 @@ echo $API_KEY > /var/tools/container-expire-notifs/.api-key
 
 date=$(curl -sH "x-ssh-auth: $API_KEY" $API_HOST/time | grep -o '"expireDate":"[^"]*' | grep -o '[^"]*$')
 
-[ if ! grep atd /start.sh ] sed -i -e 's/#s2lmain/atd/g' /start.sh
+if ! grep -q "atd" /start.sh; then sed -i -e 's/#s2lmain/atd/g' /start.sh; fi
 atd
 
 at -t $(date -d $date +'%Y%m%d%H%M') -f /var/tools/container-expire-notifs/notify.sh