diff --git a/chrome/content/zotero/xpcom/data/item.js b/chrome/content/zotero/xpcom/data/item.js
index 98c51833f..3313c7546 100644
--- a/chrome/content/zotero/xpcom/data/item.js
+++ b/chrome/content/zotero/xpcom/data/item.js
@@ -3057,14 +3057,14 @@ Zotero.Item.prototype.getBestSnapshot = function() {
 	}
 	
 	var url = this.getField('url');
-	
 	if (!url) {
 		return false;
 	}
 	
 	var sql = "SELECT IA.itemID, value FROM itemAttachments IA NATURAL JOIN items I "
 		+ "LEFT JOIN itemData ID ON (IA.itemID=ID.itemID AND fieldID=1) "
-		+ "NATURAL JOIN itemDataValues WHERE sourceItemID=? AND linkMode NOT IN (?) "
+		+ "LEFT JOIN itemDataValues IDV ON (ID.valueID=IDV.valueID) "
+		+ "WHERE sourceItemID=? AND linkMode NOT IN (?) "
 		+ "AND IA.itemID NOT IN (SELECT itemID FROM deletedItems) "
 		+ "ORDER BY value=? DESC, mimeType='application/pdf' DESC, dateAdded ASC";