diff --git a/doc/sphinx/arm/dhcp6-srv.rst b/doc/sphinx/arm/dhcp6-srv.rst
index 1009a6ee2dfa3087ab31288109474266020edbee..9df20e9f8d5a86e5773ea9d9df42e5157b22e533 100644
--- a/doc/sphinx/arm/dhcp6-srv.rst
+++ b/doc/sphinx/arm/dhcp6-srv.rst
@@ -3875,7 +3875,7 @@ configuration:
            "reservations": [
                {
                    "duid": "01:02:03:04:05:0A:0B:0C:0D:0E",
-                   "ip-addresses": [ "2001:db8:1::100" ]
+                   "ip-addresses": [ "2001:db8:1::100" ],
                    "hostname": "alice-laptop"
                }
            ]
@@ -3902,7 +3902,7 @@ different clients with different domain names:
            "reservations": [
                {
                    "duid": "01:02:03:04:05:0A:0B:0C:0D:0E",
-                   "ip-addresses": [ "2001:db8:1::100" ]
+                   "ip-addresses": [ "2001:db8:1::100" ],
                    "hostname": "mark-desktop.example.org."
                }
            ]