diff --git a/schema/mysql-migrations/upgrade_91.sql b/schema/mysql-migrations/upgrade_91.sql
new file mode 100644
index 00000000..88a551fb
--- /dev/null
+++ b/schema/mysql-migrations/upgrade_91.sql
@@ -0,0 +1,5 @@
+ALTER TABLE icinga_notification_assignment ADD assign_type ENUM('assign', 'ignore') NOT NULL DEFAULT 'assign';
+
+INSERT INTO director_schema_migration
+  (schema_version, migration_time)
+  VALUES (91, NOW());
diff --git a/schema/mysql.sql b/schema/mysql.sql
index 283cb6cd..474d0c6a 100644
--- a/schema/mysql.sql
+++ b/schema/mysql.sql
@@ -1035,6 +1035,7 @@ CREATE TABLE icinga_notification_assignment (
   id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
   notification_id INT(10) UNSIGNED NOT NULL,
   filter_string TEXT NOT NULL,  
+  assign_type ENUM('assign', 'ignore') NOT NULL DEFAULT 'assign',
   PRIMARY KEY (id),
   CONSTRAINT icinga_notification_assignment
     FOREIGN KEY notification (notification_id)
@@ -1259,4 +1260,4 @@ CREATE TABLE sync_run (
 
 INSERT INTO director_schema_migration
   SET migration_time = NOW(),
-      schema_version = 90;
+      schema_version = 91;
diff --git a/schema/pgsql-migrations/upgrade_91.sql b/schema/pgsql-migrations/upgrade_91.sql
new file mode 100644
index 00000000..c20a24a0
--- /dev/null
+++ b/schema/pgsql-migrations/upgrade_91.sql
@@ -0,0 +1,5 @@
+ALTER TABLE icinga_notification_assignment ADD assign_type enum_assign_type NOT NULL DEFAULT 'assign';
+
+INSERT INTO director_schema_migration
+  (schema_version, migration_time)
+  VALUES (91, NOW());
diff --git a/schema/pgsql.sql b/schema/pgsql.sql
index 8fcaae0b..d5612ed0 100644
--- a/schema/pgsql.sql
+++ b/schema/pgsql.sql
@@ -1159,6 +1159,7 @@ CREATE TABLE icinga_notification_assignment (
   id bigserial,
   notification_id integer NOT NULL,
   filter_string TEXT NOT NULL,
+  assign_type enum_assign_type NOT NULL DEFAULT 'assign',
   PRIMARY KEY (id),
   CONSTRAINT icinga_notification_assignment
     FOREIGN KEY (notification_id)
@@ -1472,4 +1473,4 @@ CREATE UNIQUE INDEX notification_inheritance ON icinga_notification_inheritance
 
 INSERT INTO director_schema_migration
   (schema_version, migration_time)
-  VALUES (90, NOW());
+  VALUES (91, NOW());