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-rw-r--r--compiler/types/TyCon.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/types/TyCon.hs b/compiler/types/TyCon.hs
index 827c076b2e..94fba284bf 100644
--- a/compiler/types/TyCon.hs
+++ b/compiler/types/TyCon.hs
@@ -1228,7 +1228,7 @@ isDistinctTyCon _ = False
isDistinctAlgRhs :: AlgTyConRhs -> Bool
isDistinctAlgRhs (TupleTyCon {}) = True
isDistinctAlgRhs (DataTyCon {}) = True
-isDistinctAlgRhs (DataFamilyTyCon {}) = True
+isDistinctAlgRhs (DataFamilyTyCon {}) = False
isDistinctAlgRhs (AbstractTyCon distinct) = distinct
isDistinctAlgRhs (NewTyCon {}) = False