diff --git a/doc/source/template_guide/composition.rst b/doc/source/template_guide/composition.rst
index 2bddb8b6e..2e5eb6316 100644
--- a/doc/source/template_guide/composition.rst
+++ b/doc/source/template_guide/composition.rst
@@ -138,8 +138,9 @@ To create the stack run:
 
 Get access to nested attributes
 ===============================
-There are implicit attributes of a template resource. These are
-accessible as follows:
+There are implicit attributes of a template resource. Accessing
+nested attributes require heat_template_version '2014-10-16' or
+higher and can be accessed as follows:
 
 .. code-block:: yaml
 
diff --git a/doc/source/template_guide/hot_spec.rst b/doc/source/template_guide/hot_spec.rst
index d3786d832..ac5a97049 100644
--- a/doc/source/template_guide/hot_spec.rst
+++ b/doc/source/template_guide/hot_spec.rst
@@ -630,7 +630,9 @@ get_attr
 --------
 The *get_attr* function allows referencing an attribute of a resource. At
 runtime, it will be resolved to the value of an attribute of a resource instance
-created from the respective resource definition of the template.
+created from the respective resource definition of the template. Path based
+attribute refrencing using keys or indexes requires heat_template_version
+'2014-10-16'or higher.
 The syntax of the get_attr function is as follows:
 
 ::