diff --git a/pronterface.py b/pronterface.py
index aa3fd55..336155f 100755
--- a/pronterface.py
+++ b/pronterface.py
@@ -963,7 +963,7 @@ class PronterWindow(MainWindow, pronsole.pronsole):
                 if wx.GetKeyState(wx.WXK_CONTROL) or wx.GetKeyState(wx.WXK_ALT):
                     return self.editbutton(e)
                 self.cur_button = e.GetEventObject().custombutton
-            self.onecmd(e.GetEventObject().properties[1])
+            self.onecmd(e.GetEventObject().properties.command)
             self.cur_button = None
         except:
             print _("event object missing")