diff --git a/ng2-components/ng2-activiti-processlist/src/components/activiti-process-instance-tasks.component.ts b/ng2-components/ng2-activiti-processlist/src/components/activiti-process-instance-tasks.component.ts
index 47bc72e44c..a48dbfce58 100644
--- a/ng2-components/ng2-activiti-processlist/src/components/activiti-process-instance-tasks.component.ts
+++ b/ng2-components/ng2-activiti-processlist/src/components/activiti-process-instance-tasks.component.ts
@@ -161,10 +161,10 @@ export class ActivitiProcessInstanceTasks implements OnInit {
     }
 
     public showStartDialog() {
-        if (!this.dialog.nativeElement.showModal) {
+        if (!this.startDialog.nativeElement.showModal) {
             dialogPolyfill.registerDialog(this.dialog.nativeElement);
         }
-        
+
         if (this.startDialog) {
             this.startDialog.nativeElement.showModal();
         }