1 files changed, 2 insertions, 1 deletions
diff --git a/inc/IXR_Library.php b/inc/IXR_Library.php
index e671b6880..bb1655f10 100644
--- a/inc/IXR_Library.php
+++ b/inc/IXR_Library.php
@@ -822,6 +822,7 @@ EOD;
  */
 class IXR_Date {
 
+    const XMLRPC_ISO8601 = "Ymd\TH:i:sO" ;
     /** @var DateTime */
     protected $date;
 
@@ -861,7 +862,7 @@ class IXR_Date {
      * @return string
      */
     public function getIso() {
-        return $this->date->format(DateTime::ISO8601);
+	      return $this->date->format(self::XMLRPC_ISO8601);
     }
 
     /**