Index: includes/actions/WatchAction.php
===================================================================
--- includes/actions/WatchAction.php	(revision 630)
+++ includes/actions/WatchAction.php	(revision 631)
@@ -66,8 +66,8 @@
 		$this->checkCanExecute( $user );
 
 		// Must have valid token for this action/title
-		$salt = array( $this->getName(), $this->getTitle()->getDBkey() );
-
+		$salt = array( $this->getName(), $this->getTitle()->getPrefixedDBkey() );
+		
 		if ( $user->matchEditToken( $this->getRequest()->getVal( 'token' ), $salt ) ) {
 			$this->onSubmit( array() );
 			$this->onSuccess();