diff --git a/src/main/resources/db/migration/V3_0__AddFilter.sql b/src/main/resources/db/migration/V3_0__AddFilter.sql
index 731e54b8e17c971fb8b6c651a1f48b2da32f501c..daac3a5f552ed1fc0594fd1288073a81374605db 100644
--- a/src/main/resources/db/migration/V3_0__AddFilter.sql
+++ b/src/main/resources/db/migration/V3_0__AddFilter.sql
@@ -3,6 +3,6 @@ ALTER TABLE query ADD COLUMN sql_filter text;
 ALTER TABLE query_filter DROP COLUMN filters_id;
 DROP TABLE filter_values, filter;
 
-ALTER TABLE query_filter ADD COLUMN code character varying(255) NOT NULL;
+ALTER TABLE query_filter ADD COLUMN code character varying(255) NOT NULL DEFAULT '';
 ALTER TABLE ONLY query_filter
     ADD CONSTRAINT fk_1 FOREIGN KEY (query_id) REFERENCES query(id);
\ No newline at end of file