diff --git a/chrome/content/zotero/xpcom/zotero.js b/chrome/content/zotero/xpcom/zotero.js
index ee05ce0d82..b2e856f277 100644
--- a/chrome/content/zotero/xpcom/zotero.js
+++ b/chrome/content/zotero/xpcom/zotero.js
@@ -1164,7 +1164,7 @@ Services.scriptloader.loadSubScript("resource://zotero/polyfill.js");
 	
 	
 	this.warn = function (err) {
-		Zotero.debug(err, 2);
+		Zotero.debug(err + "\n\n" + Zotero.Utilities.Internal.filterStack(new Error().stack), 2);
 		log(err.message ? err.message : err.toString(), "warning",
 			err.fileName ? err.fileName : (err.filename ? err.filename : null), null,
 			err.lineNumber ? err.lineNumber : null, null);