diff --git a/include/time.h b/include/time.h
index 58409776ff18..a9baa50ff1fd 100644
--- a/include/time.h
+++ b/include/time.h
@@ -131,18 +131,15 @@ time_t mktime __P((struct tm *));
 size_t strftime __P((char *, size_t, const char *, const struct tm *));
 time_t time __P((time_t *));
 
-#ifdef	_THREAD_SAFE
-char *asctime_r __P((const struct tm *, char *));
-char *ctime_r __P((const time_t *, char *));
-struct tm *gmtime_r __P((const time_t *, struct tm *));
-struct tm *localtime_r __P((const time_t *, struct tm *));
-#endif
-
 #ifndef _ANSI_SOURCE
 void tzset __P((void));
 #endif /* not ANSI */
 
 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
+char *asctime_r __P((const struct tm *, char *));
+char *ctime_r __P((const time_t *, char *));
+struct tm *gmtime_r __P((const time_t *, struct tm *));
+struct tm *localtime_r __P((const time_t *, struct tm *));
 char *strptime __P((const char *, const char *, struct tm *));
 char *timezone __P((int, int));
 void tzsetwall __P((void));
diff --git a/lib/libc/stdtime/asctime.c b/lib/libc/stdtime/asctime.c
index b9da143029eb..832f18592ff3 100644
--- a/lib/libc/stdtime/asctime.c
+++ b/lib/libc/stdtime/asctime.c
@@ -14,10 +14,6 @@ static char	elsieid[] = "@(#)asctime.c	7.7";
 #include "private.h"
 #include "tzfile.h"
 
-#ifndef _THREAD_SAFE
-static char *asctime_r __P((const struct tm *, char *));
-#endif
-
 /*
 ** A la X3J11, with core dump avoidance.
 */
@@ -32,9 +28,6 @@ const struct tm *	timeptr;
 	return(asctime_r(timeptr, result));
 }
 
-#ifndef _THREAD_SAFE
-static
-#endif
 char *
 asctime_r(timeptr, result)
 const struct tm *	timeptr;
diff --git a/lib/libc/stdtime/localtime.c b/lib/libc/stdtime/localtime.c
index ad227cf32029..9e130bd560e2 100644
--- a/lib/libc/stdtime/localtime.c
+++ b/lib/libc/stdtime/localtime.c
@@ -1082,19 +1082,21 @@ struct tm * const	tmp;
 #endif /* defined TM_ZONE */
 }
 
-#ifdef	_THREAD_SAFE
 struct tm *
 localtime_r(timep, p_tm)
 const time_t * const	timep;
 struct tm *p_tm;
 {
+#ifdef _THREAD_SAFE
 	pthread_mutex_lock(&lcl_mutex);
+#endif
 	tzset();
 	localsub(timep, 0L, p_tm);
+#ifdef _THREAD_SAFE
 	pthread_mutex_unlock(&lcl_mutex);
+#endif
 	return(p_tm);
 }
-#endif
 
 struct tm *
 localtime(timep)
@@ -1214,14 +1216,12 @@ const time_t * const	timep;
 #endif
 }
 
-#ifdef	_THREAD_SAFE
 struct tm *
 gmtime_r(const time_t * timep, struct tm * tm)
 {
 	gmtsub(timep, 0L, tm);
 	return(tm);
 }
-#endif
 
 #ifdef STD_INSPIRED
 
@@ -1350,7 +1350,6 @@ const time_t * const	timep;
 	return asctime(localtime(timep));
 }
 
-#ifdef _THREAD_SAFE
 char *
 ctime_r(timep, buf)
 const time_t * const	timep;
@@ -1359,7 +1358,6 @@ char *buf;
         struct tm tm;
 	return asctime_r(localtime_r(timep, &tm), buf);
 }
-#endif
 
 /*
 ** Adapted from code provided by Robert Elz, who writes: