diff --git a/modules/openapi-generator/src/main/resources/haskell-http-client/Core.mustache b/modules/openapi-generator/src/main/resources/haskell-http-client/Core.mustache
index c0b33c3c479..b313d73d480 100644
--- a/modules/openapi-generator/src/main/resources/haskell-http-client/Core.mustache
+++ b/modules/openapi-generator/src/main/resources/haskell-http-client/Core.mustache
@@ -14,7 +14,7 @@ Module : {{baseModule}}.Core
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TupleSections #-}
 {-# LANGUAGE TypeFamilies #-}
-{-# OPTIONS_GHC -fno-warn-name-shadowing -fno-warn-unused-binds #-}
+{-# OPTIONS_GHC -fno-warn-name-shadowing -fno-warn-unused-binds -fno-warn-unused-imports #-}
 
 module {{baseModule}}.Core where
 
diff --git a/samples/client/petstore/haskell-http-client/lib/OpenAPIPetstore/Core.hs b/samples/client/petstore/haskell-http-client/lib/OpenAPIPetstore/Core.hs
index 6fbc9899d34..d16b93f7ed0 100644
--- a/samples/client/petstore/haskell-http-client/lib/OpenAPIPetstore/Core.hs
+++ b/samples/client/petstore/haskell-http-client/lib/OpenAPIPetstore/Core.hs
@@ -23,7 +23,7 @@ Module : OpenAPIPetstore.Core
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TupleSections #-}
 {-# LANGUAGE TypeFamilies #-}
-{-# OPTIONS_GHC -fno-warn-name-shadowing -fno-warn-unused-binds #-}
+{-# OPTIONS_GHC -fno-warn-name-shadowing -fno-warn-unused-binds -fno-warn-unused-imports #-}
 
 module OpenAPIPetstore.Core where