diff --git a/man/newgidmap.1.xml b/man/newgidmap.1.xml
index 71b03e56..76fc1e30 100644
--- a/man/newgidmap.1.xml
+++ b/man/newgidmap.1.xml
@@ -88,7 +88,8 @@
     <title>DESCRIPTION</title>
     <para>
       The <command>newgidmap</command> sets <filename>/proc/[pid]/gid_map</filename> based on its
-      command line arguments and the gids allowed in <filename>/etc/subgid</filename>.
+      command line arguments and the gids allowed (either in <filename>/etc/subgid</filename> or
+      through the configured NSS subid module).
       Note that the root user is not exempted from the requirement for a valid
       <filename>/etc/subgid</filename> entry.
     </para>
diff --git a/man/newuidmap.1.xml b/man/newuidmap.1.xml
index a6f1f085..44eca50a 100644
--- a/man/newuidmap.1.xml
+++ b/man/newuidmap.1.xml
@@ -88,7 +88,8 @@
     <title>DESCRIPTION</title>
     <para>
       The <command>newuidmap</command> sets <filename>/proc/[pid]/uid_map</filename> based on its
-      command line arguments and the uids allowed in <filename>/etc/subuid</filename>.
+      command line arguments and the uids allowed (either in <filename>/etc/subuid</filename> or
+      through the configured NSS subid module).
       Note that the root user is not exempted from the requirement for a valid
       <filename>/etc/subuid</filename> entry.
     </para>