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-rw-r--r--src/Haddock/Interface/ExtractFnArgDocs.hs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/Haddock/Interface/ExtractFnArgDocs.hs b/src/Haddock/Interface/ExtractFnArgDocs.hs
index c5198598..0a6a05de 100644
--- a/src/Haddock/Interface/ExtractFnArgDocs.hs
+++ b/src/Haddock/Interface/ExtractFnArgDocs.hs
@@ -27,6 +27,7 @@ import GHC
getDeclFnArgDocs :: HsDecl Name -> Map Int HsDocString
getDeclFnArgDocs (SigD (TypeSig _ ty)) = getTypeFnArgDocs ty
getDeclFnArgDocs (ForD (ForeignImport _ ty _)) = getTypeFnArgDocs ty
+getDeclFnArgDocs (TyClD (TySynonym {tcdSynRhs = ty})) = getTypeFnArgDocs ty
getDeclFnArgDocs _ = Map.empty
getSigFnArgDocs :: Sig Name -> Map Int HsDocString