openbsd
diff --git a/include/libc.h b/include/libc.h
index 3880f3d..5c2e7bf 100644
--- a/include/libc.h
+++ b/include/libc.h
@@ -832,7 +832,7 @@
# endif
#endif
-#if defined(__OpenBSD__) && !defined(NOPLAN9DEFINES)
+#if defined(__OpenBSD__)
#define sched_yield() \
do { \
struct timespec ts; \
diff --git a/include/u.h b/include/u.h
index 0a696ce..c5f5dcd 100644
--- a/include/u.h
+++ b/include/u.h
@@ -95,11 +95,9 @@
# undef _NEEDULONG
#elif defined(__OpenBSD__)
# include <sys/types.h>
-# include <pthread.h>
# undef _NEEDUSHORT
# undef _NEEDUINT
# undef _NEEDULONG
-# define PLAN9PORT_USING_PTHREADS 1
#else
/* No idea what system this is -- try some defaults */
# include <pthread.h>
diff --git a/src/lib9/sleep.c b/src/lib9/sleep.c
index 9cafdcf..5da602e 100644
--- a/src/lib9/sleep.c
+++ b/src/lib9/sleep.c
@@ -1,8 +1,8 @@
#include <u.h>
#define NOPLAN9DEFINES
-#include <libc.h>
#include <sys/time.h>
#include <sched.h>
+#include <libc.h>
int
p9sleep(long milli)
