diff --git a/rclcpp/package.xml b/rclcpp/package.xml
index a16a756..ff095fe 100644
--- a/rclcpp/package.xml
+++ b/rclcpp/package.xml
@@ -1,4 +1,5 @@
 <?xml version="1.0"?>
+<?xml-model href="http://download.ros.org/package_format2.xsd" schematypens="http://www.w3.org/2001/XMLSchema"?>
 <package format="2">
   <name>rclcpp</name>
   <version>0.0.0</version>