diff --git a/plugins/dbgate-plugin-firebird/src/frontend/driver.js b/plugins/dbgate-plugin-firebird/src/frontend/driver.js
index 0212e4f04..598b9bb7b 100644
--- a/plugins/dbgate-plugin-firebird/src/frontend/driver.js
+++ b/plugins/dbgate-plugin-firebird/src/frontend/driver.js
@@ -19,6 +19,7 @@ const dialect = {
 
   dbFileExtension: '.fdb',
 
+  implicitNullDeclaration: true,
   createColumn: true,
   dropColumn: true,
   changeColumn: true,