Index: head/sys/sys/unistd.h
===================================================================
--- head/sys/sys/unistd.h
+++ head/sys/sys/unistd.h
@@ -65,7 +65,7 @@
 #define	_POSIX_MONOTONIC_CLOCK		200112L
 #define	_POSIX_NO_TRUNC			1
 #define	_POSIX_PRIORITIZED_IO		(-1)
-#define	_POSIX_PRIORITY_SCHEDULING	200112L
+#define	_POSIX_PRIORITY_SCHEDULING	0
 #define	_POSIX_RAW_SOCKETS		200112L
 #define	_POSIX_REALTIME_SIGNALS		200112L
 #define	_POSIX_SEMAPHORES		200112L