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diff --git a/extlib/Stomp/Frame.php b/extlib/Stomp/Frame.php
index 195e3b6..ab913d8 100644
--- a/extlib/Stomp/Frame.php
+++ b/extlib/Stomp/Frame.php
 -46,6 +46,7 @@ class StompFrame
         $this->command = $command;
         if ($headers != null) {
             $this->headers = $headers;
+            $this->headers['content-length'] =  strlen($body);
         }
         $this->body = $body;

 -73,4 +74,4 @@ class StompFrame
         return $data .= "\x00";
     }
 }
-?>
\ No newline at end of file
+?>