--- ./sched.h	2009-05-18 15:15:33.893366500 -0700
+++ ./sched.h	2009-01-29 19:17:29.010338200 -0800
@@ -119,6 +119,8 @@
 #  include <sys/types.h>
 /* Required by Unix 98 */
 #  include <time.h>
+#else
+typedef int pid_t;
 #endif /* PTW32_LEVEL >= PTW32_LEVEL_MAX */
 #else
 typedef int pid_t;