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-rw-r--r--compiler/iface/IfaceType.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/iface/IfaceType.hs b/compiler/iface/IfaceType.hs
index acf116169e..2ca9319b34 100644
--- a/compiler/iface/IfaceType.hs
+++ b/compiler/iface/IfaceType.hs
@@ -1467,7 +1467,7 @@ pprSum _arity is_promoted args
pprTuple :: PprPrec -> TupleSort -> PromotionFlag -> IfaceAppArgs -> SDoc
pprTuple ctxt_prec ConstraintTuple NotPromoted IA_Nil
- = maybeParen ctxt_prec appPrec $
+ = maybeParen ctxt_prec sigPrec $
text "() :: Constraint"
-- All promoted constructors have kind arguments