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
@@ -60,7 +60,7 @@
  * for the shared object.  Returns NULL on failure.
  */
 Obj_Entry *
-map_object(int fd, const char *path, const struct stat *sb)
+map_object(int fd, const char *path, const struct stat *sb, bool ismain)
 {
 	Obj_Entry *obj;
 	Elf_Ehdr *hdr;
@@ -327,8 +327,12 @@
 		obj->interp = (const char *)(obj->relocbase +
 		    phinterp->p_vaddr);
 	if (phtls != NULL) {
-		tls_dtv_generation++;
-		obj->tlsindex = ++tls_max_index;
+		if (ismain)
+			obj->tlsindex = 1;
+		else {
+			tls_dtv_generation++;
+			obj->tlsindex = ++tls_max_index;
+		}
 		obj->tlssize = phtls->p_memsz;
 		obj->tlsalign = phtls->p_align;
 		obj->tlspoffset = phtls->p_offset;
diff --git a/libexec/rtld-elf/rtld.h b/libexec/rtld-elf/rtld.h
--- a/libexec/rtld-elf/rtld.h
+++ b/libexec/rtld-elf/rtld.h
@@ -380,7 +380,7 @@
 void _rtld_error(const char *, ...) __printflike(1, 2) __exported;
 void rtld_die(void) __dead2;
 const char *rtld_strerror(int);
-Obj_Entry *map_object(int, const char *, const struct stat *);
+Obj_Entry *map_object(int, const char *, const struct stat *, bool);
 void *xcalloc(size_t, size_t);
 void *xmalloc(size_t);
 char *xstrdup(const char *);
diff --git a/libexec/rtld-elf/rtld.c b/libexec/rtld-elf/rtld.c
--- a/libexec/rtld-elf/rtld.c
+++ b/libexec/rtld-elf/rtld.c
@@ -784,7 +784,7 @@
 	 */
 	if (fd != -1) { /* Load the main program. */
 		dbg("loading main program");
-		obj_main = map_object(fd, argv0, NULL);
+		obj_main = map_object(fd, argv0, NULL, true);
 		close(fd);
 		if (obj_main == NULL)
 			rtld_die();
@@ -2920,7 +2920,7 @@
 	}
 
 	dbg("loading \"%s\"", printable_path(path));
-	obj = map_object(fd, printable_path(path), sbp);
+	obj = map_object(fd, printable_path(path), sbp, false);
 	if (obj == NULL)
 		return (NULL);