From 67254f0c147f9b9f71aabc7988e52bdaeb9576ab Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Mon, 21 Sep 2026 14:44:57 +0000
Subject:  SIGWINCH is defined in signal.h in all OSes but outside of POSIX

---
 src/supervision/s6-svscan.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/supervision/s6-svscan.c b/src/supervision/s6-svscan.c
index 9fca245..202841c 100644
--- a/src/supervision/s6-svscan.c
+++ b/src/supervision/s6-svscan.c
@@ -1,5 +1,7 @@
 /* ISC license. */
 
+#include <skalibs/nonposix.h>
+
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
@@ -731,11 +733,9 @@ int main (int argc, char const *const *argv)
   sigaddset(&set, SIGQUIT) ;
   sigaddset(&set, SIGUSR1) ;
   sigaddset(&set, SIGUSR2) ;
+  sigaddset(&set, SIGWINCH) ;
 #ifdef SIGPWR
   sigaddset(&set, SIGPWR) ;
-#endif
-#ifdef SIGWINCH
-  sigaddset(&set, SIGWINCH) ;
 #endif
   if (!selfpipe_trapset(&set)) strerr_diefu1sys(111, "trap signals") ;
 
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