diff --git a/source/pyzmq/patterns/code/pub_server.py b/source/pyzmq/patterns/code/pub_server.py
index cf2dbae..d2f8d90 100644
--- a/source/pyzmq/patterns/code/pub_server.py
+++ b/source/pyzmq/patterns/code/pub_server.py
@@ -16,5 +16,5 @@
     topic = random.randrange(9999,10005)
     messagedata = random.randrange(1,215) - 80
     print "%d %d" % (topic, messagedata)
-    socket.send("%d %d" % (topic, messagedata))
+    socket.send_string("%d %d" % (topic, messagedata))
     time.sleep(1)