diff --git a/python/monarch/_src/actor/proc_mesh.py b/python/monarch/_src/actor/proc_mesh.py
index ee340061..bf511419 100644
--- a/python/monarch/_src/actor/proc_mesh.py
+++ b/python/monarch/_src/actor/proc_mesh.py
@@ -139,7 +139,7 @@ def _labels(self) -> List[str]:
     def _new_with_shape(self, shape: Shape) -> "ProcMesh":
         device_mesh = (
             None
-            if self._device_mesh is None
+            if self._maybe_device_mesh is None
             else self._device_mesh._new_with_shape(shape)
         )
         return ProcMesh(self._proc_mesh, _mock_shape=shape, _device_mesh=device_mesh)