diff --git a/IntelFrameworkPkg/Include/Protocol/DataHub.h b/IntelFrameworkPkg/Include/Protocol/DataHub.h
index 5e2647f7f1..eb828fc6f0 100644
--- a/IntelFrameworkPkg/Include/Protocol/DataHub.h
+++ b/IntelFrameworkPkg/Include/Protocol/DataHub.h
@@ -1,7 +1,7 @@
 /** @file
   The data hub protocol is used both by agents wishing to log
   data and those wishing to be made aware of all information that
-  has been logged.
+  has been logged.  This protocol may only be called <= TPL_NOTIFY.
 
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 This program and the accompanying materials are licensed and made available under