diff --git a/sql/branch.sql b/sql/branch.sql
deleted file mode 100644
index 72c605b64..000000000
--- a/sql/branch.sql
+++ /dev/null
@@ -1,3 +0,0 @@
-ALTER TABLE recipient_settings
-    ALTER COLUMN patron_visibilities DROP NOT NULL,
-    ADD COLUMN patron_countries text CHECK (patron_countries <> '');
diff --git a/sql/migrations.sql b/sql/migrations.sql
index f1ac20001..282dd1118 100644
--- a/sql/migrations.sql
+++ b/sql/migrations.sql
@@ -3477,3 +3477,8 @@ UPDATE app_conf SET value = '"https://master.apis.dev.openstreetmap.org/api/0.6"
 UPDATE app_conf SET value = '"https://master.apis.dev.openstreetmap.org/oauth2/authorize"' WHERE key = 'openstreetmap_auth_url';
 UPDATE app_conf SET value = '"xAVaXxy0BwUef4SIo55v7E1ofuC53EN8H-X5232d8Vo"' WHERE key = 'openstreetmap_id';
 UPDATE app_conf SET value = '"JtqazsotvWZQ1G6ynYhDlHXouQji-qDwwU2WQW7j-kE"' WHERE key = 'openstreetmap_secret';
+
+-- migration #176
+ALTER TABLE recipient_settings
+    ALTER COLUMN patron_visibilities DROP NOT NULL,
+    ADD COLUMN patron_countries text CHECK (patron_countries <> '');
diff --git a/sql/schema.sql b/sql/schema.sql
index 7eaf6dbde..e52d44652 100644
--- a/sql/schema.sql
+++ b/sql/schema.sql
@@ -14,7 +14,7 @@ COMMENT ON EXTENSION pg_stat_statements IS 'track execution statistics of all SQ
 
 -- database metadata
 CREATE TABLE db_meta (key text PRIMARY KEY, value jsonb);
-INSERT INTO db_meta (key, value) VALUES ('schema_version', '175'::jsonb);
+INSERT INTO db_meta (key, value) VALUES ('schema_version', '176'::jsonb);
 
 
 -- app configuration
@@ -173,8 +173,12 @@ CREATE TRIGGER update_profile_visibility
 
 CREATE TABLE recipient_settings
 ( participant           bigint   PRIMARY KEY REFERENCES participants
-, patron_visibilities   int      NOT NULL CHECK (patron_visibilities > 0)
+, patron_visibilities   int      CHECK (patron_visibilities > 0)
 -- Three bits: 1 is for "secret", 2 is for "private", 4 is for "public".
+, patron_countries      text     CHECK (patron_countries <> '')
+-- A comma (,) separated list of uppercase 3-letter ISO country codes, possibly
+-- prefixed with a dash (-) indicating that the listed countries are the ones
+-- to exclude rather than the ones to allow.
 );