1 files changed, 2 insertions, 0 deletions
diff --git a/Parsers.hs b/Parsers.hs
index 96c4a07..84b4856 100644
--- a/Parsers.hs
+++ b/Parsers.hs
@@ -37,6 +37,8 @@ instance Alternative (Parser t) where
 
   (<|>) = alt
 
+instance MonadPlus (Parser t)
+
 -----------------------------------------------------------------------------
 
 flunk :: Parser t a