diff --git a/ryu/services/protocols/bgp/speaker.py b/ryu/services/protocols/bgp/speaker.py
index e4a9bc92..7b98aa2f 100644
--- a/ryu/services/protocols/bgp/speaker.py
+++ b/ryu/services/protocols/bgp/speaker.py
@@ -376,6 +376,8 @@ class BgpProtocol(Protocol, Activity):
         self._sendlock.acquire()
         try:
             self._socket.sendall(msg.serialize())
+        except socket.error as err:
+            self.connection_lost('failed to write to socket')
         finally:
             self._sendlock.release()