Index: head/include/time.h
===================================================================
--- head/include/time.h
+++ head/include/time.h
@@ -199,6 +199,8 @@
 time_t timelocal(struct tm * const);
 time_t timegm(struct tm * const);
 int timer_oshandle_np(timer_t timerid);
+time_t time2posix(time_t t);
+time_t posix2time(time_t t);
 #endif /* __BSD_VISIBLE */
 
 #if __POSIX_VISIBLE >= 200809 || defined(_XLOCALE_H_)