diff --git a/mobile/android/chrome/content/browser.js b/mobile/android/chrome/content/browser.js
index 205a1b768ad7..1869ebbbaa17 100644
--- a/mobile/android/chrome/content/browser.js
+++ b/mobile/android/chrome/content/browser.js
@@ -1325,7 +1325,7 @@ var BrowserApp = {
     }
     this._tabs[toPosition] = movedTab;
 
-    let evt = new UIEvent("TabMove", {"bubbles":true, "cancellable":false, "view":window, "detail":fromPosition});
+    let evt = new UIEvent("TabMove", {"bubbles":true, "cancelable":false, "view":window, "detail":fromPosition});
     this.tabs[toPosition].browser.dispatchEvent(evt);
   },