diff --git a/include/core/sensor/sensor_diff_drive.h b/include/core/sensor/sensor_diff_drive.h
index cb08a2dd0ccb7967158aa2d9319d9b1fe210670b..212a955b19c1a76aecebaa90f7cc39be73f38a7a 100644
--- a/include/core/sensor/sensor_diff_drive.h
+++ b/include/core/sensor/sensor_diff_drive.h
@@ -37,7 +37,7 @@ struct ParamsSensorDiffDrive : public ParamsSensorBase
         prior_cov_diag             = _server.getParam<Eigen::Vector3d>(prefix + _unique_name + "/prior_cov_diag");
         ticks_cov_factor           = _server.getParam<double>(prefix + _unique_name + "/ticks_cov_factor");
     }
-    std::string print() const
+    std::string print() const override
     {
         return ParamsSensorBase::print()                                         + "\n"
         + "radius_left: "                   + std::to_string(radius_left)               + "\n"
diff --git a/include/core/tree_manager/tree_manager_sliding_window.h b/include/core/tree_manager/tree_manager_sliding_window.h
index 86bc095f47220e8c82f94c9952eafbe9133cdc96..c2d06be8d17f1c2075b225b86ab7e09cf06a7aad 100644
--- a/include/core/tree_manager/tree_manager_sliding_window.h
+++ b/include/core/tree_manager/tree_manager_sliding_window.h
@@ -19,7 +19,7 @@ struct ParamsTreeManagerSlidingWindow : public ParamsTreeManagerBase
             fix_first_frame             = _server.getParam<bool>        (prefix + "/fix_first_frame");
             viral_remove_empty_parent   = _server.getParam<bool>        (prefix + "/viral_remove_empty_parent");
         }
-        std::string print() const
+        std::string print() const override
         {
             return  ParamsTreeManagerBase::print()                                            + "\n"
                         + "n_frames: "                  + std::to_string(n_frames)                  + "\n"
diff --git a/include/core/tree_manager/tree_manager_sliding_window_dual_rate.h b/include/core/tree_manager/tree_manager_sliding_window_dual_rate.h
index 3d455f89049e94181c762a8a9ef794474f94fd5c..e810c11ba34699bbe9bc1537b5995d2670049862 100644
--- a/include/core/tree_manager/tree_manager_sliding_window_dual_rate.h
+++ b/include/core/tree_manager/tree_manager_sliding_window_dual_rate.h
@@ -19,7 +19,7 @@ struct ParamsTreeManagerSlidingWindowDualRate : public ParamsTreeManagerSlidingW
             assert(n_frames_recent <= n_frames);
             rate_old_frames = _server.getParam<unsigned int>(prefix + "/rate_old_frames");
         }
-        std::string print() const
+        std::string print() const override
         {
             return ParamsTreeManagerBase::print()                            + "\n"
                         + "n_frames_recent: "   + std::to_string(n_frames_recent)   + "\n"