diff --git a/docs/apache-airflow/howto/variable.rst b/docs/apache-airflow/howto/variable.rst
index 7cb9377bdcf1..401dcb146b4a 100644
--- a/docs/apache-airflow/howto/variable.rst
+++ b/docs/apache-airflow/howto/variable.rst
@@ -62,7 +62,8 @@ You can use them in your DAGs as:
     Single underscores surround ``VAR``.  This is in contrast with the way ``airflow.cfg``
     parameters are stored, where double underscores surround the config section name.
     Variables set using Environment Variables would not appear in the Airflow UI but you will
-    be able to use them in your DAG file.
+    be able to use them in your DAG file. Variables set using Environment Variables will also
+    take precedence over variables defined in the Airflow UI.
 
 Securing Variables
 ------------------