diff --git a/schema/ttrss_schema_mysql.sql b/schema/ttrss_schema_mysql.sql
index 33c65bf4..44c30eab 100644
--- a/schema/ttrss_schema_mysql.sql
+++ b/schema/ttrss_schema_mysql.sql
@@ -21,7 +21,10 @@ create table ttrss_users (id integer primary key not null auto_increment,
 insert into ttrss_users (login,pwd_hash,access_level) values ('admin', 'password', 10);
 
 create table ttrss_feed_categories(id integer not null primary key,
-	title varchar(200) not null);
+	owner_uid integer not null,
+	title varchar(200) not null,
+	index(owner_uid),
+	foreign key (owner_uid) references ttrss_users(id) ON DELETE CASCADE);
 
 create table ttrss_feeds (id integer not null auto_increment primary key,
 	owner_uid integer not null,
diff --git a/schema/ttrss_schema_pgsql.sql b/schema/ttrss_schema_pgsql.sql
index 3e4ef6dc..93bce353 100644
--- a/schema/ttrss_schema_pgsql.sql
+++ b/schema/ttrss_schema_pgsql.sql
@@ -21,6 +21,7 @@ create table ttrss_users (id serial not null primary key,
 insert into ttrss_users (login,pwd_hash,access_level) values ('admin', 'password', 10);
 
 create table ttrss_feed_categories(id serial not null primary key,
+	owner_uid integer not null references ttrss_users(id) on delete cascade,
 	title varchar(200) not null);
 
 create table ttrss_feeds (id serial not null primary key,