--- a/editor/idl/nsICiter.idl
+++ b/editor/idl/nsICiter.idl
@@ -30,19 +30,16 @@
  * use your version of this file under the terms of the MPL, indicate your
  * decision by deleting the provisions above and replace them with the notice
  * and other provisions required by the GPL or the LGPL. If you do not delete
  * the provisions above, a recipient may use your version of this file under
  * the terms of any one of the MPL, the GPL or the LGPL.
  *
  * ***** END LICENSE BLOCK ***** */
 
-#ifndef nsICiter_h__
-#define nsICiter_h__
-
 #include "nsISupports.idl"
 #include "domstubs.idl"
 %{C++
 #include "nsString.h"
 %}
 /** Handle plaintext citations, as in mail quoting.
   * Used by the editor but not dependant on it.
   */