diff --git a/ionic/components/nav/nav-controller.ts b/ionic/components/nav/nav-controller.ts
index 1adb92eee0..e4ee9a1c3e 100644
--- a/ionic/components/nav/nav-controller.ts
+++ b/ionic/components/nav/nav-controller.ts
@@ -304,7 +304,7 @@ export class NavController extends Ion {
     }
 
     if (this.isTransitioning()) {
-      return Promise.reject('nav controller actively transitioning';
+      return Promise.reject('nav controller actively transitioning');
     }
 
     this.setTransitioning(true, 500);