diff --git a/src/ExportAssistant.py b/src/ExportAssistant.py
index 6ff4e1461..5a1f86029 100644
--- a/src/ExportAssistant.py
+++ b/src/ExportAssistant.py
@@ -110,6 +110,7 @@ class ExportAssistant(gtk.Assistant, ManagedWindow.ManagedWindow) :
         #set up Assisant
         gtk.Assistant.__init__(self)
         ##workaround around bug http://bugzilla.gnome.org/show_bug.cgi?id=56070
+        self.forward_button = None
         gtk.Assistant.forall(self, self.get_forward_button)
         ## end