diff --git a/lib/x11/ext/damage.js b/lib/x11/ext/damage.js
index 459f6ef..cdae2a4 100644
--- a/lib/x11/ext/damage.js
+++ b/lib/x11/ext/damage.js
@@ -3,21 +3,13 @@
 var x11 = require('..');
 // TODO: move to templates
 
-/*
-#define X_DamageQueryVersion            0
-#define X_DamageCreate                  1
-#define X_DamageDestroy                 2
-#define X_DamageSubtract                3
-#define X_DamageAdd                     4
-*/
-
 exports.requireExt = function(display, callback) 
 {
     var X = display.client;
     X.QueryExtension('DAMAGE', function(err, ext) {  
 
         if (!ext.present)
-            callback(new Error('extension not available'));
+            return callback(new Error('extension not available'));
 
         ext.ReportLevel	= { 
             RawRectangles: 0,