diff --git a/source/_docs/configuration/templating.markdown b/source/_docs/configuration/templating.markdown
index 8750a081f89..e7739999e0e 100644
--- a/source/_docs/configuration/templating.markdown
+++ b/source/_docs/configuration/templating.markdown
@@ -89,6 +89,11 @@ Home Assistant adds extensions to allow templates to access all of the current s
 
 [strp-format]: https://docs.python.org/3.4/library/datetime.html#strftime-and-strptime-behavior
 
+<p class='note warning'>
+If your template uses an `entity_id` that begins with a number (example: `states.device_tracker.2008_gmc`) you must use a bracket syntax to avoid errors caused by rendering the `entity_id` improperly. In the example given, the correct syntax for the device tracker would be: `states.device_tracker['2008_gmc']`
+</p>
+
+
 ## {% linkable_title Examples %}
 
 ### {% linkable_title States %}