diff --git a/share/man/man9/kmsan.9 b/share/man/man9/kmsan.9
--- a/share/man/man9/kmsan.9
+++ b/share/man/man9/kmsan.9
@@ -25,7 +25,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd August 10, 2021
+.Dd October 13, 2023
 .Dt KMSAN 9
 .Os
 .Sh NAME
@@ -108,6 +108,10 @@
 It is not recommended to enable
 .Nm
 in systems with less than 8GB of physical RAM.
+.Pp
+The sanitizer in a KMSAN-configured kernel can be disabled by setting the loader
+tunable
+.Sy debug.kmsan.disable=1 .
 .Sh FUNCTIONS
 The
 .Fn kmsan_mark