diff --git a/ng2-components/ng2-activiti-form/src/components/widgets/dynamic-table/editors/dropdown/dropdown.editor.ts b/ng2-components/ng2-activiti-form/src/components/widgets/dynamic-table/editors/dropdown/dropdown.editor.ts
index a835b35334..640855ed81 100644
--- a/ng2-components/ng2-activiti-form/src/components/widgets/dynamic-table/editors/dropdown/dropdown.editor.ts
+++ b/ng2-components/ng2-activiti-form/src/components/widgets/dynamic-table/editors/dropdown/dropdown.editor.ts
@@ -39,7 +39,7 @@ export class DropdownEditorComponent extends CellEditorComponent implements OnIn
         let field = this.table.field;
         if (field) {
             if (this.column.optionType === 'rest') {
-                if (this.table.form.processDefinitionId) {
+                if (this.table.form && this.table.form.processDefinitionId) {
                     this.getValuesByProcessDefinitionId(field);
                 } else {
                     this.getValuesByTaskId(field);