diff --git a/shoutcast.py b/shoutcast.py
index 8c73145..1e92f92 100644
--- a/shoutcast.py
+++ b/shoutcast.py
@@ -133,7 +133,8 @@ class ShoutTransfer(shoutcast.ShoutcastClient):
 		pass
 
 	def stopProducing(self):
-		shoutcast.ShoutcastClient.stopProducing(self)
+		if self.transport is not None:
+			shoutcast.ShoutcastClient.stopProducing(self)
 		self.request = None
 		self.passback = None