diff --git a/chrome/content/zotero/preferences/quickCopySiteEditor.xul b/chrome/content/zotero/preferences/quickCopySiteEditor.xul
index c9c8a3907f..bbf066b541 100644
--- a/chrome/content/zotero/preferences/quickCopySiteEditor.xul
+++ b/chrome/content/zotero/preferences/quickCopySiteEditor.xul
@@ -60,7 +60,7 @@
 		<menulist id="zotero-quickCopy-menu"/>
 		<separator class="thin"/>
 		<checkbox id="zotero-quickCopy-copyAsHTML" label="&zotero.preferences.quickCopy.copyAsHTML;"
-			oncommand="Zotero_Preferences.Export.buildQuickCopyFormatDropDown(
+			oncommand="window.opener.Zotero_Preferences.Export.buildQuickCopyFormatDropDown(
 				document.getElementById('zotero-quickCopy-menu'), this.checked ? 'html' : ''
 			)"/>
 	</vbox>
@@ -69,12 +69,12 @@
 	<![CDATA[
 		var io = window.arguments[0];
 		document.getElementById('zotero-quickCopy-domain').value = io.domain ? io.domain : '';
-		Zotero_Preferences.Export.buildQuickCopyFormatDropDown(
+		window.opener.Zotero_Preferences.Export.buildQuickCopyFormatDropDown(
 			document.getElementById('zotero-quickCopy-menu'),
 			Zotero.QuickCopy.getContentType(io.format),
 			io.format
 		);
-		Zotero_Preferences.Export.updateQuickCopyHTMLCheckbox();
+		window.opener.Zotero_Preferences.Export.updateQuickCopyHTMLCheckbox();
 	]]>
 	</script>
 </dialog>