diff --git a/awx/main/models/__init__.py b/awx/main/models/__init__.py
index c284e8e430..b53cbd5c12 100644
--- a/awx/main/models/__init__.py
+++ b/awx/main/models/__init__.py
@@ -1116,7 +1116,7 @@ class Credential(CommonModelNameNotUnique):
         if self.cloud != cloud:
             self.cloud = cloud
             if 'cloud' not in update_fields:
-                update_field.append('cloud')
+                update_fields.append('cloud')
         super(Credential, self).save(*args, **kwargs)
         # After saving a new instance for the first time, set the password
         # fields and save again.