diff --git a/docs/installation.rst b/docs/installation.rst
index b4445db..c3d93e5 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -32,3 +32,12 @@ settings.
       'embed_video',
   )
 
+To detect HTTP/S you have to use :py:class:`~django.core.context_processors.request`
+context processor:
+
+.. code-block:: python
+
+    TEMPLATE_CONTEXT_PROCESSORS = (
+        ...
+        'django.core.context_processors.request',
+    )