Fixed #2091 -- describe how to generate a CSR.
diff --git a/docs/x509/index.rst b/docs/x509/index.rst
index c3fa1ed..2e3aa74 100644
--- a/docs/x509/index.rst
+++ b/docs/x509/index.rst
@@ -8,6 +8,7 @@
 .. toctree::
     :maxdepth: 2
 
+    tutorial
     reference
 
 .. _`public key infrastructure`: https://en.wikipedia.org/wiki/Public_key_infrastructure