diff --git a/src/wp-includes/IXR/class-IXR-message.php b/src/wp-includes/IXR/class-IXR-message.php
index 613e972c65..69af8aa2c0 100644
--- a/src/wp-includes/IXR/class-IXR-message.php
+++ b/src/wp-includes/IXR/class-IXR-message.php
@@ -45,7 +45,7 @@ class IXR_Message
     function parse()
     {
         if ( ! function_exists( 'xml_parser_create' ) ) {
-            trigger_error( __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML" ) );
+            trigger_error( __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) );
             return false;
         }