diff --git a/share/man/man9/atomic.9 b/share/man/man9/atomic.9
index 397a8fcd6b18..ebc6ed791f37 100644
--- a/share/man/man9/atomic.9
+++ b/share/man/man9/atomic.9
@@ -22,7 +22,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd February 24, 2021
+.Dd March 6, 2021
 .Dt ATOMIC 9
 .Os
 .Sh NAME
@@ -612,3 +612,8 @@ and
 .Fn atomic_store
 were added in
 .Fx 12.0 .
+.Pp
+The
+.Fn atomic_interrupt_fence
+operation was added in
+.Fx 13.0 .