diff --git a/src/Data/RefinablePartition.hs b/src/Data/RefinablePartition.hs
index 5db6977e41a3c77a5940f486f9d22ac6a9178262..917f42016d0c762a619eb40a3f03af9b72029c8f 100644
--- a/src/Data/RefinablePartition.hs
+++ b/src/Data/RefinablePartition.hs
@@ -40,7 +40,6 @@ import           Data.Ord (comparing)
 import           Data.Primitive.MutVar
 import qualified Data.Vector as V
 import qualified Data.Vector.Algorithms.Heap as VM
-import           Data.Vector.Mutable (MVector)
 import qualified Data.Vector.Mutable as VM
 import qualified Data.Vector.Unboxed.Mutable as VU
 import qualified Data.Vector.Unboxed as VUU