diff --git a/arraycontext/impl/pytato/fake_numpy.py b/arraycontext/impl/pytato/fake_numpy.py
index 8cfa9ad91013be61f3f7c9c2194e7f42fc710c8b..a8a72da3c635fc22bad5e2f8640943487b55f702 100644
--- a/arraycontext/impl/pytato/fake_numpy.py
+++ b/arraycontext/impl/pytato/fake_numpy.py
@@ -94,7 +94,9 @@ class PytatoFakeNumpyNamespace(BaseFakeNumpyNamespace):
         return pt.amax(a)
 
     def stack(self, arrays, axis=0):
-        return rec_multimap_array_container(pt.stack, arrays, axis)
+        return rec_multimap_array_container(lambda *args: pt.stack(arrays=args,
+                                                                   axis=axis),
+                                            *arrays)
 
     # {{{ relational operators