diff --git a/man2/msgop.2 b/man2/msgop.2
index 3f5bc362f..b4c8c045a 100644
--- a/man2/msgop.2
+++ b/man2/msgop.2
@@ -105,13 +105,29 @@ by
 If sufficient space is available in the queue,
 .BR msgsnd ()
 succeeds immediately.
-(The queue capacity is defined by the
-.I msg_qbytes
+The queue capacity is governed by the
+.I msg_qbytes 
 field in the associated data structure for the message queue.
 During queue creation this field is initialized to
 .B MSGMNB
 bytes, but this limit can be modified using
-.BR msgctl (2).)
+.BR msgctl (2).
+A full queue is defined by two factors :
+.IP * 2
+The new msg size + current size of the queue is greater than the 
+queue's maximum size (the
+.I msg_qbytes
+field).
+.IP *
+The current amount of messages in the queue + 1 (the new msg) is 
+greater than the queue's maximum size (the
+.I msg_qbytes
+field). This is necessary to prevent users from using infinite 
+amounts of locked memory (used by the kernel for headers) by 
+sending 0-byte messages. This is equivalent to the traditional
+MSGTQL parameter present in many Unix systems. This behavior
+is unique to Linux.
+.PP
 If insufficient space is available in the queue, then the default
 behavior of
 .BR msgsnd ()