diff --git a/chrome/content/zotero/integration/addCitationDialog.js b/chrome/content/zotero/integration/addCitationDialog.js
index 4503e1ba5f..db25f5cab9 100644
--- a/chrome/content/zotero/integration/addCitationDialog.js
+++ b/chrome/content/zotero/integration/addCitationDialog.js
@@ -376,9 +376,9 @@ var Zotero_Citation_Dialog = new function () {
 	this.add = Zotero.Promise.coroutine(function* (first_item) {
 		
 		var pos, len;
-		var item = itemsView.getSelectedItems()[0]; // treeview from xpcom/itemTreeView.js
+		var items = itemsView.getSelectedItems(); // treeview from xpcom/itemTreeView.js
 		
-		if (!item) {
+		if (!items.length) {
 			yield sortCitation();
 			_updateAccept();
 			_updatePreview();
@@ -386,9 +386,11 @@ var Zotero_Citation_Dialog = new function () {
 		}
 
 		// Add to selection list and generate a new itemDataID for this cite.
-		var selectionNode = _addItem(item);
-		var itemDataID = selectionNode.getAttribute("value");
-		document.getElementById("add").disabled = !itemDataID;
+		for (let item of items) {
+			var selectionNode = _addItem(item);
+			var itemDataID = selectionNode.getAttribute("value");
+			document.getElementById("add").disabled = !itemDataID;
+		}
 
 		// Save existing locator and affix field content, if any.
 		if (first_item) {