diff --git a/usenet-scripts/movetdarr.sh b/usenet-scripts/movetdarr.sh
index 8671483..4e8024f 100644
--- a/usenet-scripts/movetdarr.sh
+++ b/usenet-scripts/movetdarr.sh
@@ -145,14 +145,19 @@ register_lease() {
 }
 
 if command -v flock >/dev/null 2>&1; then
-    flock -w 900 "$LEASE_LOCK" -c 'set -e' || true  # Lock-Datei anlegen
-    exec 9>"$LEASE_LOCK"
-    if ! flock -w 900 9; then
+    # BusyBox flock hat kein -w (timeout) → -n (non-blocking) mit Retry-Loop
+    LEASE_ACQUIRED=false
+    for i in $(seq 1 900); do
+        if flock -n "$LEASE_LOCK" -c true 2>/dev/null; then
+            LEASE_ACQUIRED=true
+            break
+        fi
+        sleep 1
+    done
+    if [ "$LEASE_ACQUIRED" != "true" ]; then
         log "WARNUNG: Lease-Lock nach 15 Minuten nicht erhalten; fahre ohne Lock fort"
-        register_lease
-    else
-        register_lease
     fi
+    register_lease
 else
     register_lease
 fi