diff --git a/chrome/content/zotero/createParentDialog.js b/chrome/content/zotero/createParentDialog.js
index 2253f7da05..dad94f3edb 100644
--- a/chrome/content/zotero/createParentDialog.js
+++ b/chrome/content/zotero/createParentDialog.js
@@ -29,7 +29,7 @@ var io;
 let createParent;
 
 function toggleAccept(enabled) {
-	document.documentElement.getButton("accept").disabled = !enabled;
+	document.querySelector('dialog').getButton("accept").disabled = !enabled;
 }
 
 function doLoad() {
@@ -45,6 +45,12 @@ function doLoad() {
 		item: io.dataIn.item,
 		toggleAccept
 	});
+
+	document.addEventListener('dialogaccept', (event) => {
+		doAccept();
+		event.preventDefault();
+	});
+	document.addEventListener('dialogextra2', doManualEntry);
 }
 
 function doUnload() {
diff --git a/chrome/content/zotero/createParentDialog.xul b/chrome/content/zotero/createParentDialog.xhtml
similarity index 92%
rename from chrome/content/zotero/createParentDialog.xul
rename to chrome/content/zotero/createParentDialog.xhtml
index e40f83280d..5748a23a2b 100644
--- a/chrome/content/zotero/createParentDialog.xul
+++ b/chrome/content/zotero/createParentDialog.xhtml
@@ -9,20 +9,19 @@
 		<!ENTITY % zoteroDTD SYSTEM "chrome://zotero/locale/zotero.dtd"> %zoteroDTD;
 ]>
 
+<window
+	xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+	xmlns:html="http://www.w3.org/1999/xhtml"
+	title="&zotero.createParent.title;"
+	onload="doLoad();"
+	onunload="doUnload();">
 <dialog
 	id="zotero-parent-dialog"
-	title="&zotero.createParent.title;"
 	orient="vertical"
 	buttons="cancel,accept,extra2"
 	buttondisabledaccept="true"
 	buttonlabelextra2="&zotero.createParent.button.manual;"
 	buttonlabelaccept="&zotero.createParent.title;"
-	ondialogaccept="doAccept();return false;"
-	ondialogextra2="doManualEntry();"
-	onload="doLoad();"
-	onunload="doUnload();"
-	xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
-	xmlns:html="http://www.w3.org/1999/xhtml"
 	style="padding:20px 15px;width:400px;">
 
 	<script src="chrome://global/content/globalOverlay.js"/>
@@ -37,3 +36,4 @@
 		<html:div id="create-parent" />
 	</vbox>
 </dialog>
+</window>
diff --git a/chrome/content/zotero/zoteroPane.js b/chrome/content/zotero/zoteroPane.js
index b39a27d9ae..f01b3a3726 100644
--- a/chrome/content/zotero/zoteroPane.js
+++ b/chrome/content/zotero/zoteroPane.js
@@ -4792,7 +4792,7 @@ var ZoteroPane = new function()
 			}
 
 			let io = { dataIn: { item }, dataOut: null };
-			window.openDialog('chrome://zotero/content/createParentDialog.xul', '', 'chrome,modal,centerscreen', io);
+			window.openDialog('chrome://zotero/content/createParentDialog.xhtml', '', 'chrome,modal,centerscreen', io);
 			if (!io.dataOut) {
 				return false;
 			}