diff --git a/mopidy/outputs/base.py b/mopidy/outputs/base.py
index 0e2cabfe..b6b024a6 100644
--- a/mopidy/outputs/base.py
+++ b/mopidy/outputs/base.py
@@ -3,6 +3,9 @@ class BaseOutput(object):
     Base class for audio outputs.
     """
 
+    def __init__(self, core_queue):
+        self.core_queue = core_queue
+
     def start(self):
         """Start the output."""
         pass