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-rw-r--r--compiler/GHC/Core/Map/Type.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/GHC/Core/Map/Type.hs b/compiler/GHC/Core/Map/Type.hs
index 050d19cba5..32b3fe054b 100644
--- a/compiler/GHC/Core/Map/Type.hs
+++ b/compiler/GHC/Core/Map/Type.hs
@@ -165,7 +165,7 @@ trieMapView ty
-- First check for TyConApps that need to be expanded to
-- AppTy chains.
| Just (tc, tys@(_:_)) <- tcSplitTyConApp_maybe ty
- = Just $ foldl' AppTy (TyConApp tc []) tys
+ = Just $ foldl' AppTy (mkTyConTy tc) tys
-- Then resolve any remaining nullary synonyms.
| Just ty' <- tcView ty = Just ty'