diff --git a/airtime_mvc/build/schema.xml b/airtime_mvc/build/schema.xml
index b9a8a6951..c8c31b8f2 100644
--- a/airtime_mvc/build/schema.xml
+++ b/airtime_mvc/build/schema.xml
@@ -322,6 +322,10 @@
     <column name="instance_id" phpName="DbInstanceId" type="INTEGER" required="true"/>
     <column name="playout_status" phpName="DbPlayoutStatus" type="SMALLINT" required="true" defaultValue="1"/>
     <column name="broadcasted" phpName="DbBroadcasted" type="SMALLINT" required="true" defaultValue="0"/>
+    <!-- Broadcasted is set to 1 when show and master source are not on. 
+         We need to know this for logging playout history. (It only gets logged when
+         broadcasted = 1)
+    -->
     <!-- This foreign key is still useful even though it may seem we don't ever delete cc_show_instances anymore.
         We will do delete them in some cases (when editing a show and changing the repeating days of the week
         for example. \