--- erts/emulator/sys/unix/sys_float.c.orig	2009-09-02 16:58:58.000000000 +0200
+++ erts/emulator/sys/unix/sys_float.c	2009-09-02 16:59:03.000000000 +0200
@@ -478,7 +478,7 @@
 #include <machine/fpu.h>
 #endif
 #if !(defined(__OpenBSD__) && defined(__x86_64__))
-#include <ucontext.h>
+#include <sys/ucontext.h>
 #endif
 #include <string.h>
 
