diff --git a/src/Grisette/Core/Data/Class/GPretty.hs b/src/Grisette/Core/Data/Class/GPretty.hs
index f5fa3eee..e9b9156f 100644
--- a/src/Grisette/Core/Data/Class/GPretty.hs
+++ b/src/Grisette/Core/Data/Class/GPretty.hs
@@ -28,6 +28,7 @@ import qualified Control.Monad.Writer.Lazy as WriterLazy
 import qualified Control.Monad.Writer.Strict as WriterStrict
 import qualified Data.ByteString as B
 import qualified Data.ByteString.Char8 as C
+import Data.Functor.Const (Const)
 import Data.Functor.Sum (Sum)
 import Data.Int (Int16, Int32, Int64, Int8)
 import Data.String (IsString (fromString))
@@ -80,7 +81,6 @@ import Prettyprinter
     Doc,
     Pretty(pretty),
   )
-import Data.Functor.Const (Const)
 #else
 import Data.Text.Prettyprint.Doc
   ( (<+>),
diff --git a/src/Grisette/Lib/Data/Function.hs b/src/Grisette/Lib/Data/Function.hs
index 8da2ae6e..fb119f05 100644
--- a/src/Grisette/Lib/Data/Function.hs
+++ b/src/Grisette/Lib/Data/Function.hs
@@ -1,6 +1,5 @@
 module Grisette.Lib.Data.Function ((.$), (.&), mrgOn) where
 
-import Data.Function (on)
 import Grisette.Core.Control.Monad.UnionM (UnionM)
 import Grisette.Core.Data.Class.Mergeable (Mergeable)
 import Grisette.Core.Data.Class.PlainUnion (simpleMerge)