diff --git a/src/common/protocol/bytestream.py b/src/common/protocol/bytestream.py
index a032e561d..64bc5aecf 100644
--- a/src/common/protocol/bytestream.py
+++ b/src/common/protocol/bytestream.py
@@ -421,6 +421,15 @@ class ConnectionSocks5Bytestream(ConnectionBytestream):
             self.connection.send(iq)
             return
 
+        my_ip = self.peerhost[0]
+
+        # check if we are connected with an IPv4 address
+        try:
+            socket.inet_aton(my_ip)
+        except socket.error as e:
+            self.connection.send(iq)
+            return
+
         def ip_is_local(ip):
             if '.' not in ip:
                 # it's an IPv6
@@ -439,9 +448,6 @@ class ConnectionSocks5Bytestream(ConnectionBytestream):
                 return True
             return False
 
-
-        my_ip = self.peerhost[0]
-
         if not ip_is_local(my_ip):
             self.connection.send(iq)
             return
@@ -475,7 +481,7 @@ class ConnectionSocks5Bytestream(ConnectionBytestream):
             cleanup_gupnp()
 
         def fail(s, error, proto, ext_ip, local_ip, local_port, desc):
-            log.debug('Got GUPnP-IGD error : %s', str(error))
+            log.debug('Got GUPnP-IGD error')
             self.connection.send(iq)
             cleanup_gupnp()