diff --git a/chrome/content/zotero/xpcom/itemTreeView.js b/chrome/content/zotero/xpcom/itemTreeView.js
index 71078eb855..715b4efceb 100644
--- a/chrome/content/zotero/xpcom/itemTreeView.js
+++ b/chrome/content/zotero/xpcom/itemTreeView.js
@@ -2600,7 +2600,7 @@ Zotero.ItemTreeCommandController.prototype.onEvent = function(evt)
 Zotero.ItemTreeView.prototype.onDragStart = function (event) {
 	// See note in LibraryTreeView::_setDropEffect()
 	if (Zotero.isWin) {
-		event.dataTransfer.effectAllowed = 'copy';
+		event.dataTransfer.effectAllowed = 'copyMove';
 	}
 	
 	var itemIDs = this.saveSelection();