diff --git a/awx/main/models/mixins.py b/awx/main/models/mixins.py
index effdc7d436..63ecf3a0dd 100644
--- a/awx/main/models/mixins.py
+++ b/awx/main/models/mixins.py
@@ -8,7 +8,7 @@ from awx.main.models.rbac import Resource
 from awx.main.fields import ImplicitResourceField
 
 
-__all__ = 'ResourceMixin'
+__all__ = ['ResourceMixin']
 
 class ResourceMixin(models.Model):