diff --git a/bin/dig/dig.docbook b/bin/dig/dig.docbook
index 52b0519592..8a3022dfc8 100644
--- a/bin/dig/dig.docbook
+++ b/bin/dig/dig.docbook
@@ -939,6 +939,9 @@
 	      resolve the name being looked up.  It will follow
 	      referrals from the root servers, showing the answer
 	      from each server that was used to resolve the lookup.
+	    </para> <para>
+	      If @server is also specified, it affects only the
+	      initial query for the root zone name servers.
 	    </para> <para>
 	      <command>+dnssec</command> is also set when +trace
 	      is set to better emulate the default queries from a