diff --git a/lib/sender.js b/lib/sender.js
index e4888cb..b75385b 100644
--- a/lib/sender.js
+++ b/lib/sender.js
@@ -104,7 +104,8 @@ class FluentSender {
     }
 
     this._push(tag, timestamp, data, callback);
-    this._connect(() => {
+    this._connect((error) => {
+      error && callback && callback(error);
       this._flushSendQueue();
     });
   }
@@ -206,9 +207,9 @@ class FluentSender {
     this._connecting = true;
     process.nextTick(() => {
       if (this._socket === null) {
-        this._doConnect(() => {
+        this._doConnect((error) => {
           this._connecting = false;
-          callback();
+          callback(error);
         });
       } else {
         if (!this._socket.writable) {
@@ -232,7 +233,7 @@ class FluentSender {
       let errorHandler = (err) => {
         if (this._socket) {
           this._disconnect();
-          this._handleEvent('error', err);
+          this._handleEvent('error', err, callback);
         }
       };
       this._socket.on('error', errorHandler);