diff --git a/share/man/man4/safe.4 b/share/man/man4/safe.4
--- a/share/man/man4/safe.4
+++ b/share/man/man4/safe.4
@@ -25,7 +25,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd November 22, 2024
+.Dd October 28, 2025
 .Dt SAFE 4
 .Os
 .Sh NAME
@@ -128,5 +128,14 @@
 .Xr random 4 ,
 .Xr crypto 7 ,
 .Xr crypto 9
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Fx 5.2 .
+It is deprecated in
+.Fx 15.0
+and removed in
+.Fx 16.0 .
 .Sh BUGS
 Public key support is not implemented.
diff --git a/sys/dev/safe/safe.c b/sys/dev/safe/safe.c
--- a/sys/dev/safe/safe.c
+++ b/sys/dev/safe/safe.c
@@ -424,6 +424,8 @@
 #ifdef SAFE_DEBUG
 	safec = sc;			/* for use by hw.safe.dump */
 #endif
+	gone_in(16, "%s(4) is deprecated in 15.0 and removed in 16.0\n",
+	    safe_driver->name);
 	return (0);
 bad4:
 	crypto_unregister_all(sc->sc_cid);