--- include/sched.h.org	Thu Dec  4 12:00:16 2008
+++ include/sched.h	Wed Dec  3 13:42:54 2008
@@ -124,8 +124,16 @@
 typedef int pid_t;
 #endif
 
-/* Thread scheduling policies */
+/* pid_t again! */
+#if defined(__MINGW32__) || defined(_UWIN)
+/* Define to `int' if <sys/types.h> does not define. */
+/* GCC 4.x reportedly defines pid_t. */
+#ifndef _PID_T_
+#define pid_t int
+#endif
+#endif
 
+/* Thread scheduling policies */
 enum {
   SCHED_OTHER = 0,
   SCHED_FIFO,