diff --git a/examples/websocket/dictTicker.py b/examples/websocket/dictTicker.py
index 6499d565..857f1a98 100644
--- a/examples/websocket/dictTicker.py
+++ b/examples/websocket/dictTicker.py
@@ -25,7 +25,7 @@ def ticker(self, market=None):
             return self.tick[self._ids[market]]
         return self.tick
 
-    def on_ticker(self, data):
+    def on_ticker(self, ws, data):
         # save ticker updates to self.tick
         data = [float(dat) for dat in data]
         self.tick[int(data[0])] = {'id': int(data[0]),