diff --git a/man5/proc.5 b/man5/proc.5
index 2481cbb49..8f3f1fed2 100644
--- a/man5/proc.5
+++ b/man5/proc.5
@@ -1063,9 +1063,12 @@ argument given to
 .BR mq_open (3).
 The default and minimum value for
 .I msg_max
-is 10; the upper limit is 
-.IR "(131072 / sizeof(void\ *))" 
+is 10; the upper limit is HARD_MAX:
+.IR "(131072\ /\ sizeof(void\ *))" 
 (32768 on Linux/86).
+This limit is ignored for privileged processes
+.RB ( CAP_SYS_RESOURCE ),
+but the HARD_MAX ceiling is nevertheless imposed.
 .TP
 .I /proc/sys/fs/mqueue/msgsize_max
 This file can be used to view and change the ceiling on the 
@@ -1078,10 +1081,15 @@ The default and minimum value for
 .I msgsize_max
 is 8192 bytes; the upper limit is INT_MAX
 (2147483647 on Linux/86).
+This limit is ignored for privileged processes
+.RB ( CAP_SYS_RESOURCE ).
 .TP
 .I /proc/sys/fs/mqueue/queues_max
 This file can be used to view and change the system-wide limit on the 
 number of message queues that can be created.
+Only privileged processes 
+.RB ( CAP_SYS_RESOURCE )
+can create new message queues once this limit has been reached.
 The default value for
 .I queues_max
 is 256; it can be changed to any value in the range 0 to INT_MAX.