diff --git a/lib/libsys/munmap.2 b/lib/libsys/munmap.2
--- a/lib/libsys/munmap.2
+++ b/lib/libsys/munmap.2
@@ -25,7 +25,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd June 22, 2017
+.Dd January 15, 2025
 .Dt MUNMAP 2
 .Os
 .Sh NAME
@@ -54,8 +54,6 @@
 .Bl -tag -width Er
 .It Bq Er EINVAL
 The
-.Fa addr
-argument was not page aligned, the
 .Fa len
 argument was zero or negative, or
 some part of the region being unmapped is outside the