diff --git a/man7/pid_namespaces.7 b/man7/pid_namespaces.7
index d7dc9e1dd..1cea76fc9 100644
--- a/man7/pid_namespaces.7
+++ b/man7/pid_namespaces.7
@@ -362,7 +362,9 @@ when a process wants to discover its PID in other namespaces.
 .TP
 .BR /proc/sys/kernel/ns_last_pid " (since Linux 3.3)"
 .\" commit b8f566b04d3cddd192cfd2418ae6d54ac6353792
-This file displays the last PID that was allocated in this PID namespace.
+This file
+(which is virtualized per PID namespace)
+displays the last PID that was allocated in this PID namespace.
 When the next PID is allocated,
 the kernel will search for the lowest unallocated PID
 that is greater than this value,