diff --git a/files/lock-util b/files/lock-util
index 7af3327..fc13e0d 100755
--- a/files/lock-util
+++ b/files/lock-util
@@ -62,7 +62,7 @@ _remove() {
         exit 1
     }
     [[ -z "$ARG" ]] && _help && echo "MISSING ARGUMENT" | $BOXES && exit 1
-    created=$( stat -c %Z "$LOCKFILE" )
+    created=$( stat -c %Y "$LOCKFILE" )
     now=$( date +%s )
     age=$(( $now - $created ))
     test $ARG -lt $age