Index: head/lib/libsbuf/Symbol.map
===================================================================
--- head/lib/libsbuf/Symbol.map	(revision 347234)
+++ head/lib/libsbuf/Symbol.map	(revision 347235)
@@ -1,42 +1,45 @@
 /*
  * $FreeBSD$
  */
 
 FBSD_1.2 {
 	sbuf_new;
 	sbuf_clear;
 	sbuf_setpos;
 	sbuf_bcat;
 	sbuf_bcpy;
 	sbuf_cat;
 	sbuf_cpy;
 	sbuf_printf;
 	sbuf_vprintf;
 	sbuf_putc;
 	sbuf_set_drain;
 	sbuf_trim;
 	sbuf_error;
 	sbuf_finish;
 	sbuf_data;
 	sbuf_len;
 	sbuf_done;
 	sbuf_delete;
 	sbuf_clear_flags;
 	sbuf_get_flags;
 	sbuf_set_flags;
 };
 
 FBSD_1.3 {
 	sbuf_start_section;
 	sbuf_end_section;
 };
 
 FBSD_1.4 {
 	sbuf_hexdump;
 };
 
 FBSD_1.5 {
 	sbuf_putbuf;
-	sbuf_printf_drain;
 };
 
+/* Added in FreeBSD 13.x */
+FBSD_1.6 {
+	sbuf_printf_drain;
+};
Index: head/lib/libsbuf/Version.def
===================================================================
--- head/lib/libsbuf/Version.def	(revision 347234)
+++ head/lib/libsbuf/Version.def	(revision 347235)
@@ -1,13 +1,17 @@
 # $FreeBSD$
 
 FBSD_1.2 {
 };
 
 FBSD_1.3 {
 } FBSD_1.2;
 
 FBSD_1.4 {
 } FBSD_1.3;
 
 FBSD_1.5 {
 } FBSD_1.4;
+
+# This version was first added to 13.0-current.
+FBSD_1.6 {
+} FBSD_1.5;