diff --git a/Control/AthenaServices/test/AthenaOutputStream_test.cxx b/Control/AthenaServices/test/AthenaOutputStream_test.cxx
index ec7891337355a36a787593514921af4711c20cc2..8425a140a0383d455cfbe52d19212527911f8c43 100644
--- a/Control/AthenaServices/test/AthenaOutputStream_test.cxx
+++ b/Control/AthenaServices/test/AthenaOutputStream_test.cxx
@@ -93,7 +93,7 @@ int main() {
   baz4lfc->setStore (bazaux4lfc.get());
   SG::AuxElement::Accessor<float> foo ("foo");
   SG::AuxElement::Accessor<double> bar ("bar");
-  SG::AuxElement::Accessor<float> zzz ("zzz");
+  SG::AuxElement::Accessor<std::vector<float>> zzz ("zzz");
   foo (*baz4lfc);
   bar (*baz4lfc);
   zzz (*baz4lfc);