diff --git a/tripleo_common/actions/parameters.py b/tripleo_common/actions/parameters.py
index 61eb48a18..d77c3b893 100644
--- a/tripleo_common/actions/parameters.py
+++ b/tripleo_common/actions/parameters.py
@@ -264,9 +264,10 @@ class GeneratePasswordsAction(base.TripleOAction):
             # We don't modify these to avoid changing defaults
             for pw_res in constants.LEGACY_HEAT_PASSWORD_RESOURCE_NAMES:
                 try:
-                    res = heat.resources.get(self.container, pw_res)
                     param_defaults = stack_env.get('parameter_defaults', {})
-                    param_defaults[pw_res] = res.attributes['value']
+                    if pw_res not in param_defaults:
+                        res = heat.resources.get(self.container, pw_res)
+                        param_defaults[pw_res] = res.attributes['value']
                 except heat_exc.HTTPNotFound:
                     LOG.debug('Heat resouce not found: %s' % pw_res)
                     pass
diff --git a/tripleo_common/tests/actions/test_parameters.py b/tripleo_common/tests/actions/test_parameters.py
index 1c7a20dff..717079f79 100644
--- a/tripleo_common/tests/actions/test_parameters.py
+++ b/tripleo_common/tests/actions/test_parameters.py
@@ -733,6 +733,7 @@ class GeneratePasswordsActionTest(base.TestCase):
 
         existing_passwords = _EXISTING_PASSWORDS.copy()
         existing_passwords.pop("AdminPassword")
+        existing_passwords.pop("PcsdPassword")
 
         mock_ctx = mock.MagicMock()
         swift = mock.MagicMock(url="http://test.com")
@@ -751,6 +752,7 @@ class GeneratePasswordsActionTest(base.TestCase):
         mock_orchestration.stacks.environment.return_value = {
             'parameter_defaults': {
                 'AdminPassword': 'ExistingPasswordInHeat',
+                'PcsdPassword': 'MyPassword',
             }
         }
         mock_get_orchestration_client.return_value = mock_orchestration
@@ -759,6 +761,7 @@ class GeneratePasswordsActionTest(base.TestCase):
         result = action.run(mock_ctx)
 
         existing_passwords["AdminPassword"] = "ExistingPasswordInHeat"
+        existing_passwords["PcsdPassword"] = "MyPassword"
         # ensure old passwords used and no new generation
         self.assertEqual(existing_passwords, result)
         mock_cache.assert_called_once_with(