1 files changed, 1 insertions, 1 deletions
diff --git a/signal.c b/signal.c
index 2b1e99a17a..bdfa321789 100644
--- a/signal.c
+++ b/signal.c
@@ -292,7 +292,7 @@ posix_signal(signum, handler)
     sigact.sa_handler = handler;
     sigemptyset(&sigact.sa_mask);
     sigact.sa_flags = 0;
-#ifdef SA_RESTART
+#if defined(SA_RESTART)
     sigact.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
 #endif
 #ifdef SA_NOCLDWAIT