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-rw-r--r--plan9/plan9ish.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/plan9/plan9ish.h b/plan9/plan9ish.h
index 5c922cf0ba..1469e10211 100644
--- a/plan9/plan9ish.h
+++ b/plan9/plan9ish.h
@@ -93,7 +93,7 @@
*/
/* #define ALTERNATE_SHEBANG "#!" / **/
-#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
+#if !defined(NSIG) || defined(M_UNIX) || defined(__unix) || defined(M_XENIX)
# include <signal.h>
#endif