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-rw-r--r--bits/sigaction.h20
1 files changed, 14 insertions, 6 deletions
diff --git a/bits/sigaction.h b/bits/sigaction.h
index e23a96cd9d..adcc276cc8 100644
--- a/bits/sigaction.h
+++ b/bits/sigaction.h
@@ -30,12 +30,20 @@
 struct sigaction
   {
     /* Signal handler.  */
-    union {
-      __sighandler_t sa_handler;
-      void (*sa_sigaction) (int, siginfo_t *, void *);
-    } __sigaction_handler;
-# define sa_handler    __sigaction_handler.sa_handler
-# define sa_sigaction  __sigaction_handler.sa_sigaction
+#ifdef __USE_POSIX199309
+    union
+      {
+	/* Used if SA_SIGINFO is not set.  */
+	__sighandler_t sa_handler;
+	/* Used if SA_SIGINFO is set.  */
+	void (*sa_sigaction) (int, siginfo_t *, void *);
+      }
+    __sigaction_handler;
+# define sa_handler	__sigaction_handler.sa_handler
+# define sa_sigaction	__sigaction_handler.sa_sigaction
+#else
+    __sighandler_t sa_handler;
+#endif
 
     /* Additional set of signals to be blocked.  */
     __sigset_t sa_mask;