diff --git a/src/beman/execution26/tests/execution-syn.pass.cpp b/src/beman/execution26/tests/execution-syn.pass.cpp
index 7a89d617..a88a3b99 100644
--- a/src/beman/execution26/tests/execution-syn.pass.cpp
+++ b/src/beman/execution26/tests/execution-syn.pass.cpp
@@ -425,7 +425,7 @@ namespace
         }
         auto operator()(int value) const
         {
-            return test_detail::sender_adaptor<arg_closure_t, int>{{*this, value}};
+            return test_detail::sender_adaptor<arg_closure_t, int>{{*this, value}, {}};
         }
     };
     constexpr arg_closure_t arg_closure{};