diff --git a/simulation/include/traccc/simulation/measurement_smearer.hpp b/simulation/include/traccc/simulation/measurement_smearer.hpp
index 5544effe86..7145732195 100644
--- a/simulation/include/traccc/simulation/measurement_smearer.hpp
+++ b/simulation/include/traccc/simulation/measurement_smearer.hpp
@@ -96,12 +96,16 @@ struct measurement_smearer {
                     std::max(std::abs(matrix_operator().element(meas, 0u, 0u)) +
                                  offset[0],
                              static_cast<scalar_type>(0.f));
+            } else if (mask_t::shape::name == "(stereo) annulus2D") {
+                iomeas.local1 =
+                    matrix_operator().element(meas, 0u, 0u) + offset[0];
             } else {
                 iomeas.local0 =
                     matrix_operator().element(meas, 0u, 0u) + offset[0];
             }
+        }
 
-        } else if (meas_dim == 2u) {
+        else if (meas_dim == 2u) {
             const auto proj = subs.projector<2u>();
             matrix_type<2u, 1u> meas = proj * bound_params.vector();