diff --git a/include/openmc/mgxs.h b/include/openmc/mgxs.h
index e178bf5b14..f9c4722e94 100644
--- a/include/openmc/mgxs.h
+++ b/include/openmc/mgxs.h
@@ -185,6 +185,9 @@ class Mgxs {
     //! @param u Incoming particle direction.
     void
     set_angle_index(Direction u);
+
+    //! \brief Provide const access to list of XsData held by this
+    const std::vector<XsData>& get_xsdata() const { return xs; }
 };
 
 } // namespace openmc