diff --git a/package.xml b/package.xml
index dde1073..58f8238 100644
--- a/package.xml
+++ b/package.xml
@@ -1,3 +1,7 @@
+<?xml version="1.0"?>
+<?xml-model
+  href="http://download.ros.org/schema/package_format3.xsd"
+  schematypens="http://www.w3.org/2001/XMLSchema"?>
 <package format="3">
   <name>rqt_dep</name>
   <version>0.4.12</version>