diff --git a/src/Lexer.hs b/src/Lexer.hs
index 273a0fe..436ebfe 100644
--- a/src/Lexer.hs
+++ b/src/Lexer.hs
@@ -136,12 +136,12 @@ delimitedAsTuple openP closeP =
         <*> located (Token <$> anyUntil closeP)
         <*> located closeP
 
-delimited :: Parser a -> Parser b -> Token -> Token -> Parser [LocatedToken]
+delimited :: Parser open -> Parser close -> Token -> Token -> Parser [LocatedToken]
 delimited openP closeP openTok closeTok = asList <$> delimitedAsTuple (openTok <$ openP) (closeTok <$ closeP)
     where
         asList (a, tok, b) = [a, tok, b]
 
-delimitedNoTrailing :: Parser a -> Parser b -> Token -> Parser [LocatedToken]
+delimitedNoTrailing :: Parser open -> Parser close -> Token -> Parser [LocatedToken]
 delimitedNoTrailing openP closeP openTok = asList <$> delimitedAsTuple (openTok <$ openP) (void closeP)
     where
         asList (a, tok, _) = [a, tok]