diff --git a/ApnsPHP/Push.php b/ApnsPHP/Push.php
index f73f3ad1..09188647 100644
--- a/ApnsPHP/Push.php
+++ b/ApnsPHP/Push.php
@@ -292,6 +292,10 @@ protected function _parseErrorMessage($sErrorMessage)
 	 */
 	protected function _readErrorMessage()
 	{
+    $bytesInSocket = socket_get_status($this->_hSocket)['unread_bytes'];
+    if($bytesInSocket === 0){
+      return null;
+    }
 		$sErrorResponse = @fread($this->_hSocket, self::ERROR_RESPONSE_SIZE);
 		if ($sErrorResponse === false || strlen($sErrorResponse) != self::ERROR_RESPONSE_SIZE) {
 			return;