diff --git a/db_scripts/diff/15628.down b/db_scripts/diff/15628.down
new file mode 100644
index 00000000..7b820506
--- /dev/null
+++ b/db_scripts/diff/15628.down
@@ -0,0 +1,3 @@
+use provisioning;
+
+DELETE FROM voip_preferences WHERE attribute = 'single_codec';
diff --git a/db_scripts/diff/15628.up b/db_scripts/diff/15628.up
new file mode 100644
index 00000000..0f33e4c5
--- /dev/null
+++ b/db_scripts/diff/15628.up
@@ -0,0 +1,29 @@
+USE provisioning;
+SET autocommit=0;
+
+
+SELECT id INTO @pgid FROM voip_preference_groups WHERE name = 'NAT and Media Flow Control';
+
+
+INSERT INTO voip_preferences SET
+  voip_preference_groups_id = @pgid,
+  attribute = "single_codec",
+  label = "Single-codec answers",
+  type = 0,
+  max_occur = 1,
+  usr_pref = 1,
+  prof_pref = 1,
+  dom_pref = 1,
+  peer_pref = 1,
+  contract_pref = 0,
+  contract_location_pref = 0,
+  dev_pref = 0,
+  devprof_pref = 0,
+  internal = 0,
+  expose_to_customer = 0,
+  data_type = "boolean",
+  read_only = 0,
+  description = "Restrict every answer to just the first preferred codec.";
+
+
+COMMIT;