diff --git a/restic-cron b/restic-cron
index e14eb6a..3334b71 100755
--- a/restic-cron
+++ b/restic-cron
@@ -51,7 +51,7 @@ if [ $status -ne 0 ]; then
 fi
 
 # Verify the backup every 4 weeks
-if [ $(($(date +%W) % 4)) = 0 ]; then
+if [ $(($(date +%-W) % 4)) = 0 ]; then
   test -z "$RESTIC_QUIET" && echo "I: Check step…"
   restic $RESTIC_QUIET check
   status=$?