diff --git a/job.go b/job.go
index 453c64d..1352708 100644
--- a/job.go
+++ b/job.go
@@ -166,8 +166,8 @@ func setJobPayloadJSONUnsafe(jobID64 int64, payload interface{}) error {
 
 func setJobPayload(jobID64 int64, payload []byte) error {
 	muxObjJob.Lock()
-	return setJobPayloadUnsafe(jobID64, payload)
 	defer muxObjJob.Unlock()
+	return setJobPayloadUnsafe(jobID64, payload)
 }
 
 func setJobPayloadUnsafe(jobID64 int64, payload []byte) error {