diff --git a/lib/libc/gen/msgsnd.3 b/lib/libc/gen/msgsnd.3
index 551bd02009b4..f54b8aec03aa 100644
--- a/lib/libc/gen/msgsnd.3
+++ b/lib/libc/gen/msgsnd.3
@@ -28,7 +28,7 @@
 .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-.\"	$Id$
+.\"	$Id: msgsnd.3,v 1.4 1997/11/23 17:58:40 bde Exp $
 .\"
 .\"/
 .Dd November 24, 1997
@@ -135,6 +135,9 @@ message.
 .Fa msgsz
 is less than 0, or greater than
 .Va msg_qbytes .
+.Pp
+.Fa mtype
+is not greater than 0.
 .It Bq Er EACCES
 The calling process does not have write access to the message queue.
 .It Bq Er EAGAIN