diff --git a/chrome/content/zotero/xpcom/itemTreeView.js b/chrome/content/zotero/xpcom/itemTreeView.js
index b6ee22aec3..bf40e914f6 100644
--- a/chrome/content/zotero/xpcom/itemTreeView.js
+++ b/chrome/content/zotero/xpcom/itemTreeView.js
@@ -2512,7 +2512,7 @@ Zotero.ItemTreeCommandController.prototype.onEvent = function(evt)
  */
 Zotero.ItemTreeView.prototype.onDragStart = function (event) {
 	// See note in LibraryTreeView::_setDropEffect()
-	if (Zotero.isWin) {
+	if (Zotero.isWin || Zotero.isLinux) {
 		event.dataTransfer.effectAllowed = 'copyMove';
 	}
 	
diff --git a/chrome/content/zotero/xpcom/libraryTreeView.js b/chrome/content/zotero/xpcom/libraryTreeView.js
index de4ce94851..065e93aadd 100644
--- a/chrome/content/zotero/xpcom/libraryTreeView.js
+++ b/chrome/content/zotero/xpcom/libraryTreeView.js
@@ -439,7 +439,7 @@ Zotero.LibraryTreeView.prototype = {
 		// the same action as the dropEffect. This allows the dropEffect setting
 		// (which we use in the tree's canDrop() and drop() to determine the desired
 		// action) to be changed, even if the cursor doesn't reflect the new setting.
-		if (Zotero.isWin) {
+		if (Zotero.isWin || Zotero.isLinux) {
 			event.dataTransfer.effectAllowed = effect;
 		}
 		event.dataTransfer.dropEffect = effect;