diff --git a/awx/main/models/credential.py b/awx/main/models/credential.py
index 81a598310292..17113427fccb 100644
--- a/awx/main/models/credential.py
+++ b/awx/main/models/credential.py
@@ -462,8 +462,7 @@ def askable_fields(self):
     def plugin(self):
         if self.kind != 'external':
             raise AttributeError('plugin')
-        [plugin] = [plugin for ns, plugin in credential_plugins.items() if ns == self.namespace]
-        return plugin
+        return ManagedCredentialType.registry.get(self.namespace, None)
 
     def default_for_field(self, field_id):
         for field in self.inputs.get('fields', []):