diff --git a/examples/domain-events/events-python/event-test.py b/examples/domain-events/events-python/event-test.py
index 3fb046e7a3ee91ba5fcb7445db6abb07b4a1b0da..3095e941526da3bb5d295f3ad10f35ab8ebb6c2a 100644
--- a/examples/domain-events/events-python/event-test.py
+++ b/examples/domain-events/events-python/event-test.py
@@ -490,7 +490,7 @@ def myDomainEventPMWakeupCallback(conn, dom, reason, opaque):
 def myDomainEventPMSuspendCallback(conn, dom, reason, opaque):
     print "myDomainEventPMSuspendCallback: Domain %s(%s) system pmsuspend" % (
             dom.name(), dom.ID())
-def myDomainEventBalloonChangeCallback(conn, dom, utcoffset, actual):
+def myDomainEventBalloonChangeCallback(conn, dom, actual, opaque):
     print "myDomainEventBalloonChangeCallback: Domain %s(%s) %d" % (dom.name(), dom.ID(), actual)
 def myDomainEventPMSuspendDiskCallback(conn, dom, reason, opaque):
     print "myDomainEventPMSuspendDiskCallback: Domain %s(%s) system pmsuspend_disk" % (