diff --git a/ui-ngx/src/app/modules/home/pages/rulechain/debug-config-panel.component.ts b/ui-ngx/src/app/modules/home/pages/rulechain/debug-config-panel.component.ts
index 1f42bb391f..baea999981 100644
--- a/ui-ngx/src/app/modules/home/pages/rulechain/debug-config-panel.component.ts
+++ b/ui-ngx/src/app/modules/home/pages/rulechain/debug-config-panel.component.ts
@@ -82,7 +82,7 @@ export class DebugConfigPanelComponent extends PageComponent implements OnInit {
     this.onFailuresControl.patchValue(this.debugFailures);
   }
 
-  onCancel() {
+  onCancel(): void {
     this.popover?.hide();
   }