diff --git a/tripleo_common/constants.py b/tripleo_common/constants.py
index e27fd1cc3..3dc5da62e 100644
--- a/tripleo_common/constants.py
+++ b/tripleo_common/constants.py
@@ -60,6 +60,7 @@ PASSWORD_PARAMETER_NAMES = (
     'CephAdminKey',
     'CephClientKey',
     'CephClusterFSID',
+    'CephMdsKey',
     'CephMonKey',
     'CephRgwKey',
     'CinderPassword',
diff --git a/tripleo_common/tests/actions/test_parameters.py b/tripleo_common/tests/actions/test_parameters.py
index 26a366f90..9ec77db2a 100644
--- a/tripleo_common/tests/actions/test_parameters.py
+++ b/tripleo_common/tests/actions/test_parameters.py
@@ -45,6 +45,7 @@ _EXISTING_PASSWORDS = {
     'PankoPassword': 'cVZXehsSc2KdmFFMKDudxTLKn',
     'ManilaPassword': 'NYJN86Fua3X8AVFWmMhQa2zTH',
     'NeutronMetadataProxySharedSecret': 'Q2YgUCwmBkYdqsdhhCF4hbghu',
+    'CephMdsKey': b'AQCQXtlXAAAAABAAT4Gk+U8EqqStL+JFa9bp1Q==',
     'CephMonKey': b'AQCQXtlXAAAAABAA9l+59N3yH+C49Y0JiKeGFg==',
     'SwiftHashSuffix': 'td8mV6k7TYEGKCDvjVBwckpn9',
     'SnmpdReadonlyUserPassword': 'TestPassword',