diff --git a/installer/data/mysql/db_revs/241200010.pl b/installer/data/mysql/db_revs/241200010.pl
index 25b92446b0..dd1463b12e 100755
--- a/installer/data/mysql/db_revs/241200010.pl
+++ b/installer/data/mysql/db_revs/241200010.pl
@@ -13,7 +13,7 @@ return {
             $dbh->do(
                 q{
                     ALTER TABLE borrower_attribute_types
-                    MODIFY COLUMN `mandatory` tinyint(1) DEFAULT 0 COMMENT 'defines if the attribute is mandatory or not in the staff interface'
+                    MODIFY COLUMN `mandatory` tinyint(1) NOT NULL DEFAULT 0 COMMENT 'defines if the attribute is mandatory or not in the staff interface'
                 }
             );
             say_success( $out, "Modified column 'borrower_attribute_types.mandatory'" );
@@ -21,7 +21,7 @@ return {
             $dbh->do(
                 q{
                     ALTER TABLE borrower_attribute_types
-                    ADD COLUMN `opac_mandatory` tinyint(1) DEFAULT 0 COMMENT 'defines if the attribute is mandatory or not in the OPAC'
+                    ADD COLUMN `opac_mandatory` tinyint(1) NOT NULL DEFAULT 0 COMMENT 'defines if the attribute is mandatory or not in the OPAC'
                     AFTER `mandatory`
                 }
             );