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--- a/src/Linear/Instances.hs
+++ b/src/Linear/Instances.hs
@@ -21,8 +21,10 @@ import Control.Monad.Zip
import Data.Complex
import Data.Orphans ()
+#if ! MIN_VERSION_base_orphans(0,8,3)
instance MonadZip Complex where
mzipWith = liftA2
instance MonadFix Complex where
mfix f = (let a :+ _ = f a in a) :+ (let _ :+ a = f a in a)
+#endif
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