diff --git a/massiv.cabal b/massiv.cabal
--- a/massiv.cabal
+++ b/massiv.cabal
@@ -1,5 +1,5 @@
 name:                massiv
-version:             0.2.4.1
+version:             0.2.5.0
 synopsis:            Massiv (Массив) is an Array Library.
 description:         Multi-dimensional Arrays with fusion, stencils and parallel computation.
 homepage:            https://github.com/lehins/massiv
diff --git a/src/Data/Massiv/Array/Ops/Map.hs b/src/Data/Massiv/Array/Ops/Map.hs
--- a/src/Data/Massiv/Array/Ops/Map.hs
+++ b/src/Data/Massiv/Array/Ops/Map.hs
@@ -183,4 +183,3 @@
       iterLinearM_ sz slackStart totalLength 1 (<) $ \ !i ix -> do
         void $ f ix (unsafeLinearIndex arr i)
 {-# INLINE imapP_ #-}
-
diff --git a/src/Data/Massiv/Core/Index.hs b/src/Data/Massiv/Core/Index.hs
--- a/src/Data/Massiv/Core/Index.hs
+++ b/src/Data/Massiv/Core/Index.hs
@@ -253,9 +253,9 @@
 
 -- | Type safe way of inserting a particular dimension, thus raising index dimensionality.
 --
--- @since 0.2.4
-insertDimension :: IsIndexDimension ix n => ix -> Dimension n -> Lower ix
-insertDimension ix d = dropDim' ix (fromDimension d)
+-- @since 0.2.5
+insertDimension :: IsIndexDimension ix n => Lower ix -> Dimension n -> Int -> ix
+insertDimension ix d = insertDim' ix (fromDimension d)
 {-# INLINE [1] insertDimension #-}