diff --git a/src/Data/Abstract/Value/Abstract.hs b/src/Data/Abstract/Value/Abstract.hs
index f2eb54cb8..9324ffb66 100644
--- a/src/Data/Abstract/Value/Abstract.hs
+++ b/src/Data/Abstract/Value/Abstract.hs
@@ -135,7 +135,6 @@ instance AbstractValue term address Abstract m where
 
   tuple _ = pure Abstract
 
-  klass _ _     = pure Abstract
   namespace _ _ = pure Abstract
 
   asPair _ = pure (Abstract, Abstract)