diff --git a/chrome/content/zotero/xpcom/debug.js b/chrome/content/zotero/xpcom/debug.js
index b7352b2cb..3e9eb64f8 100644
--- a/chrome/content/zotero/xpcom/debug.js
+++ b/chrome/content/zotero/xpcom/debug.js
@@ -111,7 +111,7 @@ Zotero.Debug = new function () {
 				//
 				// TODO: Get rid of the filename and line number
 				if (Zotero.isWin && !Zotero.isStandalone) {
-					let console = Components.utils.import("resource://gre/modules/devtools/Console.jsm", {}).console;
+					var console = Components.utils.import("resource://gre/modules/devtools/Console.jsm", {}).console;
 					console.log(output);
 				}
 				// Otherwise dump to the text console