diff --git a/lib/client.js b/lib/client.js
index 9f07f4e..14432f4 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -23,7 +23,7 @@
       return this.api.queuesCreate(queue_name, {
         queue: options
       }, function(error, body) {
-        return typeof cb === "function" ? cb(cb(error, body)) : void 0;
+        return typeof cb === "function" ? cb(error, body) : void 0;
       });
     };
 
@@ -31,7 +31,7 @@
       return this.api.queuesUpdate(queue_name, {
         queue: options
       }, function(error, body) {
-        return typeof cb === "function" ? cb(cb(error, body)) : void 0;
+        return typeof cb === "function" ? cb(error, body) : void 0;
       });
     };
 
@@ -49,7 +49,7 @@
 
     Client.prototype.clear = function(cb) {
       return this.api.queuesClear(this.api.options.queue_name, function(error, body) {
-        return typeof cb === "function" ? cb(cb(error, body)) : void 0;
+        return typeof cb === "function" ? cb(error, body) : void 0;
       });
     };
 
@@ -57,7 +57,7 @@
       return this.api.queuesUpdate(this.api.options.queue_name, {
         queue: options
       }, function(error, body) {
-        return typeof cb === "function" ? cb(cb(error, body)) : void 0;
+        return typeof cb === "function" ? cb(error, body) : void 0;
       });
     };
 
@@ -68,7 +68,7 @@
       return this.api.queuesAddSubscribers(this.api.options.queue_name, {
         subscribers: subscribers
       }, function(error, body) {
-        return typeof cb === "function" ? cb(cb(error, body)) : void 0;
+        return typeof cb === "function" ? cb(error, body) : void 0;
       });
     };
 
@@ -79,7 +79,7 @@
       return this.api.queuesRemoveSubscribers(this.api.options.queue_name, {
         subscribers: subscribers
       }, function(error, body) {
-        return typeof cb === "function" ? cb(cb(error, body)) : void 0;
+        return typeof cb === "function" ? cb(error, body) : void 0;
       });
     };
 
@@ -90,13 +90,13 @@
       return this.api.queuesReplaceSubscribers(this.api.options.queue_name, {
         subscribers: subscribers
       }, function(error, body) {
-        return typeof cb === "function" ? cb(cb(error, body)) : void 0;
+        return typeof cb === "function" ? cb(error, body) : void 0;
       });
     };
 
     Client.prototype.del_queue = function(cb) {
       return this.api.queuesDelete(this.api.options.queue_name, function(error, body) {
-        return typeof cb === "function" ? cb(cb(error, body)) : void 0;
+        return typeof cb === "function" ? cb(error, body) : void 0;
       });
     };
 
@@ -176,7 +176,7 @@
 
     Client.prototype.del = function(message_id, options, cb) {
       return this.api.messagesDelete(this.api.options.queue_name, message_id, options, function(error, body) {
-        return typeof cb === "function" ? cb(cb(error, body)) : void 0;
+        return typeof cb === "function" ? cb(error, body) : void 0;
       });
     };
 
@@ -184,7 +184,7 @@
       var ids;
       ids = prepareIdsToRemove(options);
       return this.api.messagesMultipleDelete(this.api.options.queue_name, ids, function(error, body) {
-        return typeof cb === "function" ? cb(cb(error, body)) : void 0;
+        return typeof cb === "function" ? cb(error, body) : void 0;
       });
     };
 
@@ -202,7 +202,7 @@
 
     Client.prototype.msg_release = function(message_id, reservation_id, options, cb) {
       return this.api.messageRelease(this.api.options.queue_name, message_id, reservation_id, options, function(error, body) {
-        return typeof cb === "function" ? cb(cb(error, body)) : void 0;
+        return typeof cb === "function" ? cb(error, body) : void 0;
       });
     };