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-rw-r--r--compiler/utils/Panic.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/utils/Panic.hs b/compiler/utils/Panic.hs
index b12d677a1e..0a21f251fb 100644
--- a/compiler/utils/Panic.hs
+++ b/compiler/utils/Panic.hs
@@ -38,7 +38,7 @@ import Debug.Trace ( trace )
import System.IO.Unsafe
import System.Environment
-#ifndef mingw32_HOST_OS
+#if !defined(mingw32_HOST_OS)
import System.Posix.Signals as S
#endif