diff --git a/src/common/jingle_rtp.py b/src/common/jingle_rtp.py
index fe3195bd4..9bd8ff533 100644
--- a/src/common/jingle_rtp.py
+++ b/src/common/jingle_rtp.py
@@ -158,7 +158,7 @@ class JingleRTPContent(JingleContent):
 
     def _fill_content(self, content):
         content.addChild(nbxmpp.NS_JINGLE_RTP + ' description',
-            attrs={'media': self.media}, payload=self.iter_codecs())
+            attrs={'media': self.media}, payload=list(self.iter_codecs()))
 
     def _setup_funnel(self):
         self.funnel = Gst.ElementFactory.make('funnel', None)