diff --git a/python/adapters/ponsim_olt/ponsim_olt.py b/python/adapters/ponsim_olt/ponsim_olt.py
index 4f5af65..fc617a3 100644
--- a/python/adapters/ponsim_olt/ponsim_olt.py
+++ b/python/adapters/ponsim_olt/ponsim_olt.py
@@ -399,7 +399,7 @@
             for frame in self.frames:
                 self.log.info('received-grpc-frame',
                               frame_len=len(frame.payload))
-                yield self._rcv_frame(frame.payload)
+                self._rcv_frame(frame.payload)
 
         except _Rendezvous, e:
             log.warn('grpc-connection-lost', message=e.message)