diff --git a/src-ui/src/app/components/common/edit-dialog/workflow-edit-dialog/workflow-edit-dialog.component.ts b/src-ui/src/app/components/common/edit-dialog/workflow-edit-dialog/workflow-edit-dialog.component.ts
index 4844dedc2..9bf49036f 100644
--- a/src-ui/src/app/components/common/edit-dialog/workflow-edit-dialog/workflow-edit-dialog.component.ts
+++ b/src-ui/src/app/components/common/edit-dialog/workflow-edit-dialog/workflow-edit-dialog.component.ts
@@ -258,7 +258,7 @@ export class WorkflowEditDialogComponent
       filter_has_correspondent: null,
       filter_has_document_type: null,
       matching_algorithm: MATCH_NONE,
-      match: null,
+      match: '',
       is_insensitive: true,
     }
     this.object.triggers.push(trigger)