diff --git a/man3/mq_open.3 b/man3/mq_open.3
index f5833cc9f..149a51b90 100644
--- a/man3/mq_open.3
+++ b/man3/mq_open.3
@@ -168,6 +168,11 @@ but a queue with this
 already exists.
 .TP
 .B EINVAL
+.I name
+doesn't follow the format in
+.BR mq_overview (7).
+.TP
+.B EINVAL
 .B O_CREAT
 was specified in
 .IR oflag ,