diff --git a/chrome/content/zotero/xpcom/integration.js b/chrome/content/zotero/xpcom/integration.js
index 0103bea461..c6d6f26cfd 100644
--- a/chrome/content/zotero/xpcom/integration.js
+++ b/chrome/content/zotero/xpcom/integration.js
@@ -420,7 +420,7 @@ Zotero.Integration = new function() {
 							installed = true;
 						}
 						catch (e) {
-							me._doc.displayAlert(
+							doc.displayAlert(
 								Zotero.getString(
 									'integration.error.styleNotFound', data.style.styleID
 								),