diff --git a/README.md b/README.md
index 1e7d7740..85d142f1 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Some people like to read code on GitHub though, so here we are!
 ## Example usage:
 
 ```haskell
-{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE DataKinds, ExtendedDefaultRules #-}
 
 import Vivid