diff --git a/src/Midi.hs b/src/Midi.hs
index 2b7a359..8c4eacc 100644
--- a/src/Midi.hs
+++ b/src/Midi.hs
@@ -1,2 +1,2 @@
-{-# LANGUAGE TemplateHaskell, FlexibleInstances#-}
+{-# LANGUAGE TemplateHaskell, FlexibleInstances, OverlappingInstances #-}