diff --git a/lib/connect-logger.js b/lib/connect-logger.js
index 8162b50..a53f7e0 100644
--- a/lib/connect-logger.js
+++ b/lib/connect-logger.js
@@ -89,12 +89,12 @@ function getLogger(logger4js, options) {
 					if(res.statusCode >= 400) level = levels.ERROR;
 				}
 				if (thislogger.isLevelEnabled(level)) {
-          var default_tokens = assemble_tokens(req, res);
+          var combined_tokens = assemble_tokens(req, res, options.tokens || []);
 					if (typeof fmt === 'function') {
-						var line = fmt(req, res, function(str){ return format(str, default_tokens); });
+						var line = fmt(req, res, function(str){ return format(str, combined_tokens); });
 						if (line) thislogger.log(level, line);
 					} else {
-						thislogger.log(level, format(fmt, default_tokens));
+						thislogger.log(level, format(fmt, combined_tokens));
 					}
 				}
 			});
@@ -113,7 +113,19 @@ function getLogger(logger4js, options) {
  * @param  {Array} custom_tokens [{ token: string-or-regexp, replacement: string-or-replace-function }]
  * @return {Array}
  */
-function assemble_tokens(req, res) {
+function assemble_tokens(req, res, custom_tokens) {
+  var array_unique_tokens = function(array) {
+    var a = array.concat();
+    for(var i=0; i<a.length; ++i) {
+      for(var j=i+1; j<a.length; ++j) {
+        if(a[i].token == a[j].token) { // not === because token can be regexp object
+          a.splice(j--, 1);
+        }
+      }
+    }
+    return a;
+  };
+
   var default_tokens = [];
   default_tokens.push({ token: ':url', replacement: req.originalUrl });
   default_tokens.push({ token: ':method', replacement: req.method });
@@ -136,7 +148,7 @@ function assemble_tokens(req, res) {
       : (res.__headers && res.__headers[field]);
   } });
 
-  return default_tokens;
+  return array_unique_tokens(custom_tokens.concat(default_tokens));
 };
 
 /**