diff --git a/src/Illuminate/Queue/Queue.php b/src/Illuminate/Queue/Queue.php
index c53dcf355392..617532665b69 100755
--- a/src/Illuminate/Queue/Queue.php
+++ b/src/Illuminate/Queue/Queue.php
@@ -86,7 +86,9 @@ protected function createPayload($job, $data = '', $queue = null)
         $payload = json_encode($this->createPayloadArray($job, $data, $queue));
 
         if (JSON_ERROR_NONE !== json_last_error()) {
-            throw new InvalidPayloadException;
+            throw new InvalidPayloadException(
+                'Unable to JSON encode payload. Error code: '.json_last_error()
+            );
         }
 
         return $payload;