diff --git a/include/openmc/random_ray/random_ray.h b/include/openmc/random_ray/random_ray.h
index c114007c63..5ee64574ec 100644
--- a/include/openmc/random_ray/random_ray.h
+++ b/include/openmc/random_ray/random_ray.h
@@ -38,14 +38,14 @@ public:
   // Public data members
   vector<float> angular_flux_;
 
+private:
   //----------------------------------------------------------------------------
   // Private data members
-private:
+  vector<float> delta_psi_;
+  int negroups_;
   FlatSourceDomain* domain_ {nullptr}; // pointer to domain that has flat source
                                        // data needed for ray transport
-  vector<float> delta_psi_;
   double distance_travelled_ {0};
-  int negroups_;
   bool is_active_ {false};
   bool is_alive_ {true};
 }; // class RandomRay
diff --git a/src/random_ray/random_ray.cpp b/src/random_ray/random_ray.cpp
index f471c75517..63d728cce8 100644
--- a/src/random_ray/random_ray.cpp
+++ b/src/random_ray/random_ray.cpp
@@ -70,9 +70,9 @@ double RandomRay::distance_active_;
 unique_ptr<Source> RandomRay::ray_source_;
 
 RandomRay::RandomRay()
-  : negroups_(data::mg.num_energy_groups_),
-    angular_flux_(data::mg.num_energy_groups_),
-    delta_psi_(data::mg.num_energy_groups_)
+  : angular_flux_(data::mg.num_energy_groups_),
+    delta_psi_(data::mg.num_energy_groups_),
+    negroups_(data::mg.num_energy_groups_)
 {}
 
 RandomRay::RandomRay(uint64_t ray_id, FlatSourceDomain* domain) : RandomRay()