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diff --git a/testsuite/tests/rts/derefnull.hs b/testsuite/tests/rts/derefnull.hs
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+++ b/testsuite/tests/rts/derefnull.hs
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+
+{-
+By default, on Windows a segfault will pop up an annoying dialog box.
+We want the RTS to catch it instead.
+-}
+
+module Main where
+
+import Foreign
+
+main :: IO ()
+main = do x <- peek nullPtr
+ print (x :: Int)
+