diff --git a/doc/source/index.rst b/doc/source/index.rst
index 6d5d1551373..10ea0bcd4f1 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -17,6 +17,7 @@ Contents:
    addons
    development
    project
+   old-version
 
 Indices and tables
 ==================
diff --git a/doc/source/old-version.rst b/doc/source/old-version.rst
new file mode 100644
index 00000000000..d7458063be7
--- /dev/null
+++ b/doc/source/old-version.rst
@@ -0,0 +1,11 @@
+Main differences with the 6.0 client
+====================================
+
+.. No more populate.sh, use virtualenvs
+
+.. Logic is mainly in Javascript (had to make a choice between JS and
+.. Python logic)
+
+.. Templating language changes
+
+.. How to port addons and modules?