diff --git a/arraycontext/impl/pytato.py b/arraycontext/impl/pytato.py
index 93bf7e47fb6a0614dc82f6ca1702adfe1e076c1f..8663b7c60d462678fcf1cb1afe34f72132021dcc 100644
--- a/arraycontext/impl/pytato.py
+++ b/arraycontext/impl/pytato.py
@@ -528,6 +528,7 @@ class PytatoArrayContext(ArrayContext):
 
         return pt.einsum(spec, *(preprocess_arg(arg) for arg in args))
 
+    @property
     def permits_inplace_modification(self):
         return False