diff --git a/lib/http.js b/lib/http.js
index 3aa9758..c6f3112 100644
--- a/lib/http.js
+++ b/lib/http.js
@@ -97,6 +97,7 @@ var HTTPObject = function(engine) {
             ]);
         } else if (this.engine == "CURL") {
             this.interface = SHELL.create();
+            this.interface.setPrefix("bin\\curl");   // the location of cURL binary
         }
         return this;
     };
@@ -449,7 +450,7 @@ var HTTPObject = function(engine) {
                 if (this.states.length > 0) {
                     // Make CURL context
                     var state = this.states[this.states.length - 1];
-                    var cmd = ["bin\\curl"];
+                    var cmd = [];
                     var url = state.url;
 
                     if (this.isDebugging) {