diff --git a/modules/board/board.view.php b/modules/board/board.view.php
index 43761aa77..6c5dab7ce 100644
--- a/modules/board/board.view.php
+++ b/modules/board/board.view.php
@@ -821,7 +821,7 @@ class boardView extends board
 		}
 
 		// if the document is not existed, then back to the board content page
-		if(!$oDocument->isExists())
+		if(!$oDocument || !$oDocument->isExists())
 		{
 			return $this->dispBoardContent();
 		}