diff --git a/Tools/autotest/param_metadata/param.py b/Tools/autotest/param_metadata/param.py
index 0d6b2e58bc..2ed689834e 100644
--- a/Tools/autotest/param_metadata/param.py
+++ b/Tools/autotest/param_metadata/param.py
@@ -24,6 +24,7 @@ known_param_fields = [
              'Increment',
              'User',
              'RebootRequired'
+             'Bitmask'
                       ]
 
 required_param_fields = [