diff --git a/includes/common.inc b/includes/common.inc
index e67b0053f02a6fd5356bba1360dfb5f03dd22ab1..8a9b30994a4618e94966ac915f6ab55baaed73d2 100644
--- a/includes/common.inc
+++ b/includes/common.inc
@@ -885,12 +885,15 @@ function page_footer() {
 
 include_once "includes/$config.php";
 include_once "includes/database.inc";
-include_once "includes/xmlrpc.inc";
 include_once "includes/module.inc";
 include_once "includes/theme.inc";
 include_once "includes/pager.inc";
 include_once "includes/menu.inc";
 
+if (!function_exists("xmlrpc_decode")) {
+  include_once "includes/xmlrpc.inc";
+}
+
 // initialize configuration variables, using values from conf.php if available:
 $conf = variable_init(isset($conf) ? $conf : array());