--- bison-2.4.2.orig/lib/spawn.in.h	2010-03-17 20:17:04.000000000 +0100
+++ bison-2.4.2/lib/spawn.in.h	2010-07-30 17:23:46.000000000 +0200
@@ -29,13 +29,8 @@
 #ifndef _GL_SPAWN_H
 #define _GL_SPAWN_H
 
-/* Get definitions of 'struct sched_param' and 'sigset_t'.
-   But avoid namespace pollution on glibc systems.  */
-#ifndef __GLIBC__
-# include <sched.h>
-# include <signal.h>
-#endif
-
+#include <sched.h>
+#include <signal.h>
 #include <sys/types.h>
 
 #ifndef __THROW