diff --git a/lib/libsbuf/Symbol.map b/lib/libsbuf/Symbol.map
index 44839d19456a..3efd20bdf5c5 100644
--- a/lib/libsbuf/Symbol.map
+++ b/lib/libsbuf/Symbol.map
@@ -37,6 +37,9 @@ FBSD_1.4 {
 
 FBSD_1.5 {
 	sbuf_putbuf;
-	sbuf_printf_drain;
 };
 
+/* Added in FreeBSD 13.x */
+FBSD_1.6 {
+	sbuf_printf_drain;
+};
diff --git a/lib/libsbuf/Version.def b/lib/libsbuf/Version.def
index 2894712e22df..8b472b8b3782 100644
--- a/lib/libsbuf/Version.def
+++ b/lib/libsbuf/Version.def
@@ -11,3 +11,7 @@ FBSD_1.4 {
 
 FBSD_1.5 {
 } FBSD_1.4;
+
+# This version was first added to 13.0-current.
+FBSD_1.6 {
+} FBSD_1.5;