diff --git a/db_scripts/diff/15157.down b/db_scripts/diff/15157.down
new file mode 100644
index 00000000..9cbb9fe2
--- /dev/null
+++ b/db_scripts/diff/15157.down
@@ -0,0 +1,8 @@
+SET AUTOCOMMIT=0;
+USE provisioning;
+
+SELECT id INTO @mode_id FROM voip_preferences WHERE attribute = 'dialogic_mode';
+DELETE FROM voip_preferences_enum WHERE
+	preference_id = @mode_id AND value = 'sipisdn';
+
+COMMIT;
diff --git a/db_scripts/diff/15157.up b/db_scripts/diff/15157.up
new file mode 100644
index 00000000..f246c4b0
--- /dev/null
+++ b/db_scripts/diff/15157.up
@@ -0,0 +1,10 @@
+SET AUTOCOMMIT=0;
+USE provisioning;
+
+SELECT id INTO @mode_id FROM voip_preferences WHERE attribute = 'dialogic_mode';
+INSERT INTO voip_preferences_enum
+  (preference_id, label, value, usr_pref, dom_pref, peer_pref, default_val)
+  VALUES
+  (@mode_id, 'SIP/ISDN', 'sipisdn', 0, 0, 1, 0);
+
+COMMIT;