diff --git a/ChangeLog.md b/ChangeLog.md
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--- /dev/null
+++ b/ChangeLog.md
@@ -0,0 +1,3 @@
+# Changelog for postgresql-common-persistent
+
+## Unreleased changes
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright Ian Duncan (c) 2018
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Ian Duncan nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,1 @@
+# postgresql-common-persistent
diff --git a/Setup.hs b/Setup.hs
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--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/postgresql-common-persistent.cabal b/postgresql-common-persistent.cabal
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--- /dev/null
+++ b/postgresql-common-persistent.cabal
@@ -0,0 +1,58 @@
+-- This file has been generated from package.yaml by hpack version 0.28.2.
+--
+-- see: https://github.com/sol/hpack
+--
+-- hash: 479b4f48750c8668063e5a74af51be88a8553157b555f5a1c6463950323c865e
+
+name:           postgresql-common-persistent
+version:        0.1.0.0
+synopsis:       Persistent compatibility for postgresql-common
+description:    Please see the README on GitHub at <https://github.com/iand675/postgresql-common-persistent#readme>
+homepage:       https://github.com/iand675/postgresql-common#readme
+bug-reports:    https://github.com/iand675/postgresql-common/issues
+author:         Ian Duncan
+maintainer:     ian@iankduncan.com
+copyright:      Ian Duncan
+license:        BSD3
+license-file:   LICENSE
+build-type:     Simple
+cabal-version:  >= 1.10
+extra-source-files:
+    ChangeLog.md
+    README.md
+
+source-repository head
+  type: git
+  location: https://github.com/iand675/postgresql-common
+
+library
+  exposed-modules:
+      Database.Persist.Postgresql.Common
+  other-modules:
+      Paths_postgresql_common_persistent
+  hs-source-dirs:
+      src
+  build-depends:
+      base >=4.7 && <5
+    , bytestring
+    , persistent
+    , postgresql-common
+    , text
+  default-language: Haskell2010
+
+test-suite postgresql-common-persistent-test
+  type: exitcode-stdio-1.0
+  main-is: Spec.hs
+  other-modules:
+      Paths_postgresql_common_persistent
+  hs-source-dirs:
+      test
+  ghc-options: -threaded -rtsopts -with-rtsopts=-N
+  build-depends:
+      base >=4.7 && <5
+    , bytestring
+    , persistent
+    , postgresql-common
+    , postgresql-common-persistent
+    , text
+  default-language: Haskell2010
diff --git a/src/Database/Persist/Postgresql/Common.hs b/src/Database/Persist/Postgresql/Common.hs
new file mode 100644
--- /dev/null
+++ b/src/Database/Persist/Postgresql/Common.hs
@@ -0,0 +1,18 @@
+{-# LANGUAGE OverloadedStrings #-}
+module Database.Persist.Postgresql.Common
+    ( LSN(..)
+    ) where
+
+import Database.PostgreSQL.Types.LSN
+import Database.Persist.Sql
+import qualified Data.Text as T
+
+instance PersistField LSN where
+  toPersistValue = PersistDbSpecific . encodeLSN
+  fromPersistValue (PersistDbSpecific t) = case decodeLSN t of
+    Left err -> Left $ T.pack err
+    Right ok -> Right ok
+  fromPersistValue _ = Left "Could not decode LSN"
+
+instance PersistFieldSql LSN where
+  sqlType _ = SqlOther "pg_lsn"
diff --git a/test/Spec.hs b/test/Spec.hs
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--- /dev/null
+++ b/test/Spec.hs
@@ -0,0 +1,2 @@
+main :: IO ()
+main = putStrLn "Test suite not yet implemented"