diff --git a/haddock.cabal b/haddock.cabal
index 5f6e271975498ebf6c554210f3212ee196bb5986..27f2d604ef5ffc65843643857a96d9fb1f48a62b 100644
--- a/haddock.cabal
+++ b/haddock.cabal
@@ -17,7 +17,7 @@ stability:            experimental
 
 extra-source-files:
   CHANGES
-  README
+  README.md
   doc/Makefile
   doc/README.md
   doc/*.rst