diff --git a/session/avoid_session_start.rst b/session/avoid_session_start.rst
index d3db016d44b..b5e8ab3f1c6 100644
--- a/session/avoid_session_start.rst
+++ b/session/avoid_session_start.rst
@@ -29,7 +29,7 @@ access the flash messages:
 
 .. code-block:: html+twig
 
-    {% if app.request.method == 'POST' %}
+    {% if app.request.hasPreviousSession %}
         {% for message in app.flashes('notice') %}
             <div class="flash-notice">
                 {{ message }}