diff --git a/bumblebee/output.py b/bumblebee/output.py
index c3b232b..743b08f 100644
--- a/bumblebee/output.py
+++ b/bumblebee/output.py
@@ -4,30 +4,21 @@ class Output(object):
         self._theme = theme
         self._callbacks = {}
 
-    def add_callback(self, cmd, button, module=None, instance=None):
+    def add_callback(self, cmd, button, module=None):
         self._callbacks[(
             button,
             module,
-            instance
         )] = cmd
 
     def callback(self, event):
         cb = self._callbacks.get((
             event.get("button", -1),
             event.get("name", None),
-            event.get("instance", None)
-        ), None)
-        if cb is not None: return cb
-        cb = self._callbacks.get((
-            event.get("button", -1),
-            event.get("name", None),
-            None
         ), None)
         if cb is not None: return cb
         cb = self._callbacks.get((
             event.get("button", -1),
             None,
-            None
         ), None)
         return cb