diff --git a/src/Monolog/Handler/Slack/SlackRecord.php b/src/Monolog/Handler/Slack/SlackRecord.php
index 3c64ef4b..95318849 100644
--- a/src/Monolog/Handler/Slack/SlackRecord.php
+++ b/src/Monolog/Handler/Slack/SlackRecord.php
@@ -96,12 +96,15 @@ class SlackRecord
     public function getSlackData(array $record)
     {
         $dataArray = array(
-            'channel'     => $this->channel,
             'username'    => $this->username,
             'text'        => '',
             'attachments' => array(),
         );
 
+        if ($this->channel) {
+            $dataArray['channel'] = $this->channel;
+        }
+
         if ($this->formatter) {
             $message = $this->formatter->format($record);
         } else {