diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,3 +1,8 @@
+1.18.0.1
+--------
+* Fixed the test suite.
+* Fixed builds on older GHCs.
+
 1.18
 ----
 * Consolidated `eye2` .. `eye4` into a single `identity` combinator.
diff --git a/linear.cabal b/linear.cabal
--- a/linear.cabal
+++ b/linear.cabal
@@ -1,6 +1,6 @@
 name:          linear
 category:      Math, Algebra
-version:       1.18
+version:       1.18.0.1
 license:       BSD3
 cabal-version: >= 1.8
 license-file:  LICENSE
diff --git a/src/Linear/Matrix.hs b/src/Linear/Matrix.hs
--- a/src/Linear/Matrix.hs
+++ b/src/Linear/Matrix.hs
@@ -75,6 +75,7 @@
 -- >>> import Data.Complex
 -- >>> import Data.IntMap
 -- >>> import Debug.SimpleReflect.Vars
+-- >>> import Linear.V
 
 infixl 7 !*!
 -- | Matrix product. This can compute any combination of sparse and dense multiplication.
@@ -227,8 +228,6 @@
 -- V4 (V4 1 0 0 0) (V4 0 1 0 0) (V4 0 0 1 0) (V4 0 0 0 1)
 -- >>> identity :: V3 (V3 Int)
 -- V3 (V3 1 0 0) (V3 0 1 0) (V3 0 0 1)
--- >>> identity :: V 2 (V 2 Int)
--- V (fromList [V (fromList [1, 0]), V (fromList [0, 1]))
 identity :: (Num a, Traversable t, Applicative t) => t (t a)
 identity = scaled (pure 1)
 
diff --git a/src/Linear/V.hs b/src/Linear/V.hs
--- a/src/Linear/V.hs
+++ b/src/Linear/V.hs
@@ -92,6 +92,7 @@
 type role V nominal representational
 #endif
 
+
 newtype V n a = V { toVector :: V.Vector a } deriving (Eq,Ord,Show,Read,Typeable,NFData
                                                       , Generic
 -- GHC bug: https://ghc.haskell.org/trac/ghc/ticket/8468
@@ -368,7 +369,11 @@
 vDataType = mkDataType "Linear.V.V" [vConstr]
 {-# NOINLINE vDataType #-}
 
-instance (Typeable (V n), Typeable (V n a), Dim n, Data a) => Data (V n a) where
+#if __GLASGOW_HASKELL__ >= 708
+#define Typeable1 Typeable
+#endif
+
+instance (Typeable1 (V n), Typeable (V n a), Dim n, Data a) => Data (V n a) where
   gfoldl f z (V as) = z (V . fromList) `f` V.toList as
   toConstr _ = vConstr
   gunfold k z c = case constrIndex c of
diff --git a/src/Linear/V0.hs b/src/Linear/V0.hs
--- a/src/Linear/V0.hs
+++ b/src/Linear/V0.hs
@@ -79,8 +79,13 @@
 #endif
                         )
 
-instance Serial1 V0
-instance Serial (V0 a)
+instance Serial1 V0 where
+  serializeWith f = serialize
+  deserializeWith f = deserialize
+
+instance Serial (V0 a) where
+  serialize V0 = return ()
+  deserialize = return V0
 
 instance Binary (V0 a) where
   put V0 = return ()