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-rw-r--r--compiler/prelude/TysWiredIn.hs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/prelude/TysWiredIn.hs b/compiler/prelude/TysWiredIn.hs
index 4bf7ad6642..682c9d7d8a 100644
--- a/compiler/prelude/TysWiredIn.hs
+++ b/compiler/prelude/TysWiredIn.hs
@@ -639,6 +639,7 @@ typeNatKind = mkTyConTy typeNatKindCon
typeSymbolKind = mkTyConTy typeSymbolKindCon
constraintKindTyCon :: TyCon
+-- 'TyCon.isConstraintKindCon' assumes that this is an AlgTyCon!
constraintKindTyCon = pcTyCon constraintKindTyConName Nothing [] []
liftedTypeKind, typeToTypeKind, constraintKind :: Kind