diff --git a/robots/icub_description/robots/icub.urdf b/robots/icub_description/robots/icub.urdf
index 3487940b41b3a690c2ed0d242d6e711c4fe7f1e3..e9525db6853da150838bd15ff7d3c1741bb95a29 100644
--- a/robots/icub_description/robots/icub.urdf
+++ b/robots/icub_description/robots/icub.urdf
@@ -1,3 +1,4 @@
+<?xml version="1.0" ?>
 <robot name="iCub">
     <link name="base_link" />
     <link name="chest">