diff --git a/chrome/content/zotero/xpcom/debug.js b/chrome/content/zotero/xpcom/debug.js
index 43c270d4dd..b716b94c08 100644
--- a/chrome/content/zotero/xpcom/debug.js
+++ b/chrome/content/zotero/xpcom/debug.js
@@ -238,9 +238,6 @@ Zotero.Debug = new function () {
 		});
 	});
 	
-	this._setLevel = function(level) {
-		_level = level;
-	}
 	
 	this.addListener = function (listener) {
 		this.enabled = true;