diff --git a/templating.rst b/templating.rst
index 00cd2c27602..7f5203bb97c 100644
--- a/templating.rst
+++ b/templating.rst
@@ -410,6 +410,9 @@ template living inside the AcmeBlogBundle, for example, can be overridden
 by placing a template of the same name in the ``app/Resources/AcmeBlogBundle/views/``
 directory. This gives the power to override templates from any vendor bundle.
 
+If you have overridden a template, you can use the "!" prefix to refer to the original bundle's
+template. E.g. ``@!AcmeBlog/layout.html.twig``
+
 Template Suffix
 ~~~~~~~~~~~~~~~
 
diff --git a/templating/overriding.rst b/templating/overriding.rst
index 5247c155aa0..cda4a16bdf5 100644
--- a/templating/overriding.rst
+++ b/templating/overriding.rst
@@ -19,6 +19,11 @@ from the bundle to ``templates/bundles/AcmeBlogBundle/Blog/index.html.twig``
 (the ``templates/bundles/AcmeBlogBundle/`` directory won't exist, so you'll need
 to create it). You're now free to customize the template.
 
+If you don't want to override the entire template but instead just want to 
+override a block, as of Symfony 3.4 you can now do with by extending the original
+template using the "!" prefix. For example:
+``{% extends "@!AcmeBlogBundle/layout.html.twig" %}``
+
 .. caution::
 
     If you add a template in a new location, you *may* need to clear your