diff --git a/core/misc/tabbingmanager.js b/core/misc/tabbingmanager.js
index 6e2ce843fc7..ca4991bc4e2 100644
--- a/core/misc/tabbingmanager.js
+++ b/core/misc/tabbingmanager.js
@@ -127,7 +127,7 @@
     },
 
     /**
-     * Makes all elements outside the of the tabbingContext's set untabbable.
+     * Makes all elements outside of the tabbingContext's set untabbable.
      *
      * Elements made untabbable have their original tabindex and autofocus
      * values stored so that they might be restored later when this