diff --git a/lib/libthread_db/Makefile b/lib/libthread_db/Makefile
index 53f5500adc2b..f74e49d11010 100644
--- a/lib/libthread_db/Makefile
+++ b/lib/libthread_db/Makefile
@@ -12,5 +12,11 @@ INCS=	thread_db.h
 WARNS?= 1
 
 CFLAGS+=-I. -I${.CURDIR}
+SYM_MAPS+=${.CURDIR}/Symbol.map
+
+.if defined(SYMVER_ENABLED)
+SYMBOL_MAPS=${SYM_MAPS}
+VERSION_DEF=${.CURDIR}/../libc/Versions.def
+.endif
 
 .include <bsd.lib.mk>
diff --git a/lib/libthread_db/Symbol.map b/lib/libthread_db/Symbol.map
new file mode 100644
index 000000000000..9a3af90f36d0
--- /dev/null
+++ b/lib/libthread_db/Symbol.map
@@ -0,0 +1,31 @@
+# $FreeBSD$
+
+FBSD_1.0 {
+	td_init;
+	td_ta_clear_event;
+	td_ta_delete;
+	td_ta_event_addr;
+	td_ta_event_getmsg;
+	td_ta_map_id2thr;
+	td_ta_map_lwp2thr;
+	td_ta_new;
+	td_ta_set_event;
+	td_ta_thr_iter;
+	td_ta_tsd_iter;
+	td_thr_clear_event;
+	td_thr_dbresume;
+	td_thr_dbsuspend;
+	td_thr_event_enable;
+	td_thr_event_getmsg;
+	td_thr_get_info;
+	td_thr_getfpregs;
+	td_thr_getgregs;
+	td_thr_getxmmregs;	# x86 only
+	td_thr_set_event;
+	td_thr_setfpregs;
+	td_thr_setgregs;
+	td_thr_setxmmregs;	# x86 only
+	td_thr_sstep;		# FreeBSD extension to GDB<->thread interface
+	td_thr_tls_get_addr;
+	td_thr_validate;
+};