diff --git a/man2/msgctl.2 b/man2/msgctl.2
index 9ffd75bf4..5f32be6e2 100644
--- a/man2/msgctl.2
+++ b/man2/msgctl.2
@@ -144,7 +144,7 @@ set to
 .BR EIDRM ).
 The calling process must have appropriate privileges
 or its effective user ID must be either that of the creator or owner
-of the message queue.
+of the message queue. The third argument to msgctl() is ignored in this case.
 .TP
 .BR IPC_INFO " (Linux-specific)"
 Returns information about system-wide message queue limits and