diff --git a/_includes/sidebar.html b/_includes/sidebar.html
index eea267128d26adc6c9b35fcca1da7a7d24b2592e..7c3177780c213fc214c321efd4558869c8a0fcd5 100644
--- a/_includes/sidebar.html
+++ b/_includes/sidebar.html
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
 <div class="sidebar">
   <div class="container">
     <div class="sidebar-about">
@@ -11,7 +12,8 @@
     <nav class="sidebar-nav">
       {% include sidebar-nav-item.html url="/"            title="Home," %}
       {% include sidebar-nav-item.html url="/seminar/"            title="Seminar," %}<br/>
-      {% include sidebar-nav-item.html url="/resources/"      title="Resources,"%}<br/>
+      {% include sidebar-nav-item.html url="/resources/"      title="Resources,"%}
+      {% include sidebar-nav-item.html url="/nda/"      title="NDA,"%}<br/>
       {% include sidebar-nav-item.html url="/development/"      title="Devel.," %} 
       {% include sidebar-nav-item.html url="/systems/"      title="Software/Tools,"%}<br/>