docs: Small sphinx template correction
diff --git a/docs/ns3_html_theme/theme.conf b/docs/ns3_html_theme/theme.conf
index fd5de72..f733deb 100644
--- a/docs/ns3_html_theme/theme.conf
+++ b/docs/ns3_html_theme/theme.conf
@@ -7,6 +7,8 @@
 projectname = ndnSIM
 homepage = http://ndnSIM.net/
 homepage2 = http://irl.cs.ucla.edu/
+apidocs = ndnSIM API
+apidocsurl = http://ndnSIM.net/doxygen/annotated.html
 customstylesheet = ns3_stylesheet.css
 logo = ndn-logo.png
 logo2 = irl-logo.png