diff --git a/docs/values.rst b/docs/values.rst
index ebd21d1..61eca25 100644
--- a/docs/values.rst
+++ b/docs/values.rst
@@ -46,6 +46,7 @@ value:
 
     class Dev(Configuration):
         DEBUG = values.BooleanValue(True)
+        DEBUG_PROPAGATE_EXCEPTIONS = values.BooleanValue(DEBUG)
 
 See the list of :ref:`built-in value classes<built-ins>` for more information.