diff --git a/libexec/rtld-elf/map_object.c b/libexec/rtld-elf/map_object.c
--- a/libexec/rtld-elf/map_object.c
+++ b/libexec/rtld-elf/map_object.c
@@ -25,7 +25,6 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#define _WANT_P_OSREL
 #include <sys/param.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
@@ -43,8 +42,6 @@
     Elf_Phdr **phdr);
 static int convert_flags(int); /* Elf flags -> mmap flags */
 
-int __getosreldate(void);
-
 static bool
 phdr_in_zero_page(const Elf_Ehdr *hdr)
 {
@@ -204,8 +201,7 @@
 	    segs[nsegs]->p_memsz);
 	mapsize = base_vlimit - base_vaddr;
 	base_addr = (caddr_t)base_vaddr;
-	base_flags = __getosreldate() >= P_OSREL_MAP_GUARD ?
-	    MAP_GUARD : MAP_PRIVATE | MAP_ANON | MAP_NOCORE;
+	base_flags = MAP_GUARD | MAP_ANON | MAP_NOCORE;
 	if (npagesizes > 1 &&  rtld_round_page(segs[0]->p_filesz) >=
 	    pagesizes[1])
 		base_flags |= MAP_ALIGNED_SUPER;
diff --git a/sys/sys/param.h b/sys/sys/param.h
--- a/sys/sys/param.h
+++ b/sys/sys/param.h
@@ -97,7 +97,6 @@
 #define	P_OSREL_MAP_ANON		800104
 #define	P_OSREL_MAP_FSTRICT		1100036
 #define	P_OSREL_SHUTDOWN_ENOTCONN	1100077
-#define	P_OSREL_MAP_GUARD		1200035
 #define	P_OSREL_WRFSBASE		1200041
 #define	P_OSREL_CK_CYLGRP		1200046
 #define	P_OSREL_VMTOTAL64		1200054