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diff --git a/src/Test/QuickCheck/Instances.hs b/src/Test/QuickCheck/Instances.hs
index 98367b7..f65eb37 100644
--- a/src/Test/QuickCheck/Instances.hs
+++ b/src/Test/QuickCheck/Instances.hs
@@ -30,2 +30,3 @@ import Data.Word
+#if ! MIN_VERSION_QuickCheck(2,8,2)
instance (Arbitrary k, Arbitrary v, Eq k, Ord k) => Arbitrary (Map.Map k v) where
@@ -37,2 +38,3 @@ instance (CoArbitrary k, CoArbitrary v, Eq k, Ord k) => CoArbitrary (Map.Map k v
coarbitrary = coarbitrary . Map.keys
+#endif
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