diff --git a/ansible_mitogen/plugins/action/mitogen_get_stack.py b/ansible_mitogen/plugins/action/mitogen_get_stack.py
index 12afbfba..171f84ea 100644
--- a/ansible_mitogen/plugins/action/mitogen_get_stack.py
+++ b/ansible_mitogen/plugins/action/mitogen_get_stack.py
@@ -47,8 +47,9 @@ class ActionModule(ActionBase):
                 'skipped': True,
             }
 
+        _, stack = self._connection._build_stack()
         return {
             'changed': True,
-            'result': self._connection._build_stack(),
+            'result': stack,
             '_ansible_verbose_always': True,
         }