diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,3 +1,9 @@
+# 2.1.1
+* Fixed support for GHC 7.0
+
+# 2.1
+* Added `ReifiedMonoid` and `ReifiedApplicative`.
+
 # 2
 * Added `reifyNat` and `reifySymbol` for GHC 7.8+, capable of reflecting into the `KnownNat` and `KnownSymbol` classes respectively for use with other APIs.
 * Back-ported `reifyTypeable` from `lens`. This enables us to perform a (less efficient) form of `Typeable` reflection.
diff --git a/fast/Data/Reflection.hs b/fast/Data/Reflection.hs
--- a/fast/Data/Reflection.hs
+++ b/fast/Data/Reflection.hs
@@ -527,7 +527,11 @@
 --
 -- This can be necessary to work around the changes to @Data.Typeable@ in GHC HEAD.
 reifyTypeable :: Typeable a => a -> (forall (s :: *). (Typeable s, Reifies s a) => Proxy s -> r) -> r
+#if MIN_VERSION_base(4,4,0)
 reifyTypeable a k = unsafeDupablePerformIO $ do
+#else
+reifyTypeable a k = unsafePerformIO $ do
+#endif
   p <- newStablePtr a
   let n = stablePtrToIntPtr p
   reifyByte (fromIntegral n) (\s0 ->
diff --git a/reflection.cabal b/reflection.cabal
--- a/reflection.cabal
+++ b/reflection.cabal
@@ -1,5 +1,5 @@
 name:           reflection
-version:        2.1
+version:        2.1.1
 license:        BSD3
 license-file:   LICENSE
 author:         Edward A. Kmett, Elliott Hird, Oleg Kiselyov and Chung-chieh Shan