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-rw-r--r--src/Language/GraphQL/AST/Parser.hs3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/Language/GraphQL/AST/Parser.hs b/src/Language/GraphQL/AST/Parser.hs
index 150586e..ea517da 100644
--- a/src/Language/GraphQL/AST/Parser.hs
+++ b/src/Language/GraphQL/AST/Parser.hs
@@ -334,7 +334,8 @@ operationDefinition = SelectionSet <$> selectionSet
operationType :: Parser OperationType
operationType = Query <$ symbol "query"
<|> Mutation <$ symbol "mutation"
- -- <?> Keep default error message
+ <|> Subscription <$ symbol "subscription"
+ <?> "OperationType"
selectionSet :: Parser SelectionSet
selectionSet = braces (NonEmpty.some selection) <?> "SelectionSet"