diff --git a/lib/request-agent.js b/lib/request-agent.js
index 596410d..dc225e8 100644
--- a/lib/request-agent.js
+++ b/lib/request-agent.js
@@ -5,14 +5,14 @@ var _ = require('underscore');
 module.exports = function(agent){
   this.agent = agent;
 
-  var evalIfFunction = function(variable){
-    return _.isFunction(variable) ? variable() : variable;
+  var evalIfFunction = function(variable, options){
+    return _.isFunction(variable) ? variable(options) : variable;
   };
 
   this.make = function(options, callback){
-    var data = evalIfFunction(options.data) || {},
-        query = evalIfFunction(options.query) || {},
-        headers = evalIfFunction(options.headers) || {},
+    var data = evalIfFunction(options.data, options) || {},
+        query = evalIfFunction(options.query, options) || {},
+        headers = evalIfFunction(options.headers, options) || {},
         method = options.method === 'delete' ? 'del' : options.method,
         request = this.agent[method](options.url);