diff --git a/man2/setns.2 b/man2/setns.2
index c02efa02f..9b20038e0 100644
--- a/man2/setns.2
+++ b/man2/setns.2
@@ -101,10 +101,14 @@ to reenter the caller's current user namespace.
 This prevents a caller that has dropped capabilities from regaining
 those capabilities via a call to
 .BR setns ().
+
 A process reassociating itself with a user namespace must have
 .B CAP_SYS_ADMIN
 .\" See kernel/user_namespace.c:userns_install() [3.8 source]
 privileges in the target user namespace.
+Upon successfully joining a user namespace,
+a process is granted all capabilities in that namespace,
+regardless of its user and group IDs.
 
 A process may not be reassociated with a new mount namespace if it is
 multi-threaded.