1 files changed, 2 insertions, 0 deletions
diff --git a/testsuite/tests/polykinds/T7594.hs b/testsuite/tests/polykinds/T7594.hs
index 18da70342c..ae21956d45 100644
--- a/testsuite/tests/polykinds/T7594.hs
+++ b/testsuite/tests/polykinds/T7594.hs
@@ -1,11 +1,13 @@
 {-# LANGUAGE FlexibleInstances     #-}
 {-# LANGUAGE UndecidableInstances  #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
+{-# LANGUAGE UndecidableSuperClasses #-}
 {-# LANGUAGE KindSignatures        #-}
 {-# LANGUAGE TypeOperators         #-}
 {-# LANGUAGE ConstraintKinds #-}
 {-# LANGUAGE GADTs           #-}
 {-# LANGUAGE Rank2Types      #-}
+
 module T7594 where
 
 import GHC.Exts (Constraint)