--- libcoro/coro.c	2005/09/05 22:13:05	1.18
+++ libcoro/coro.c	2006/10/26 05:20:47	1.20
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001-2005 Marc Alexander Lehmann <schmorp@schmorp.de>
+ * Copyright (c) 2001-2006 Marc Alexander Lehmann <schmorp@schmorp.de>
  * 
  * Redistribution and use in source and binary forms, with or without modifica-
  * tion, are permitted provided that the following conditions are met:
@@ -49,6 +49,10 @@
 # endif
 #endif
 
+#if CORO_UCONTEXT
+# include <stddef.h>
+#endif
+
 #if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX
 
 #include <stdlib.h>
@@ -167,7 +171,7 @@
   if (~ostk.ss_flags & SS_DISABLE)
     sigaltstack (&ostk, 0);
 
-  sigaction (SIGUSR1, &osa, 0);
+  sigaction (SIGUSR2, &osa, 0);
 
   sigprocmask (SIG_SETMASK, &osig, 0);