diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2018 Tom Sydney Kerckhove
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/Setup.hs b/Setup.hs
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--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,3 @@
+import Distribution.Simple
+
+main = defaultMain
diff --git a/src/Data/Validity/Primitive.hs b/src/Data/Validity/Primitive.hs
new file mode 100644
--- /dev/null
+++ b/src/Data/Validity/Primitive.hs
@@ -0,0 +1,17 @@
+{-# OPTIONS_GHC -fno-warn-orphans #-}
+{-# LANGUAGE CPP #-}
+
+module Data.Validity.Primitive where
+
+import Data.Validity
+
+import qualified Data.Primitive.Array as A
+#if MIN_VERSION_primitive(0,6,2)
+instance Validity a => Validity (A.Array a) where
+    validate = foldMap validate
+#else
+instance Validity a => Validity (A.Array a) where
+    validate xs =
+        let n = I# (sizeofArray# (array# xs))
+         in delve "Primitive array" . validate $ indexArray xs <$> [0 .. n - 1]
+#endif
diff --git a/validity-primitive.cabal b/validity-primitive.cabal
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--- /dev/null
+++ b/validity-primitive.cabal
@@ -0,0 +1,38 @@
+cabal-version: >= 1.10
+
+-- This file has been generated from package.yaml by hpack version 0.29.6.
+--
+-- see: https://github.com/sol/hpack
+--
+-- hash: de1c5c575a4a387824d4790cfb885a96c63655e43c44e1f5067f1ca4a048721b
+
+name:           validity-primitive
+version:        0.0.0.0
+synopsis:       Validity instances for primitive
+description:    Please see README.md
+category:       Validity
+homepage:       https://github.com/NorfairKing/validity#readme
+bug-reports:    https://github.com/NorfairKing/validity/issues
+author:         Nick Van den Broeck
+maintainer:     syd.kerckhove@gmail.com
+copyright:      Copyright: (c) 2017-2018 Tom Sydney Kerckhove
+license:        MIT
+license-file:   LICENSE
+build-type:     Simple
+
+source-repository head
+  type: git
+  location: https://github.com/NorfairKing/validity
+
+library
+  exposed-modules:
+      Data.Validity.Primitive
+  other-modules:
+      Paths_validity_primitive
+  hs-source-dirs:
+      src
+  build-depends:
+      base >=4.7 && <5
+    , primitive
+    , validity >=0.5
+  default-language: Haskell2010