diff --git a/widgets/gogame.py b/widgets/gogame.py
index f4f6b9a..863dc11 100644
--- a/widgets/gogame.py
+++ b/widgets/gogame.py
@@ -200,7 +200,7 @@ class GoGame(gtk.HBox):
         self.white_cap_value.set_text(str(self.goban.white_captures))
 
 
-    def update(self, changed):
+    def update(self, changed=None):
         self.update_info()
         self.update_board(changed)