diff --git a/mopidy/mixers/alsa.py b/mopidy/mixers/alsa.py
index f4f40ca1..f19819e8 100644
--- a/mopidy/mixers/alsa.py
+++ b/mopidy/mixers/alsa.py
@@ -23,7 +23,9 @@ class AlsaMixer(ThreadingActor, BaseMixer):
     """
 
     def __init__(self):
-        # PYKKA-TODO: Do mixer detection after actor starts?
+        self._mixer = None
+
+    def post_start(self):
         self._mixer = alsaaudio.Mixer(self._get_mixer_control())
         assert self._mixer is not None