diff --git a/src/spatio_temporal_voxel_layer.cpp b/src/spatio_temporal_voxel_layer.cpp
index cad14402..72d36ca7 100644
--- a/src/spatio_temporal_voxel_layer.cpp
+++ b/src/spatio_temporal_voxel_layer.cpp
@@ -493,6 +493,7 @@ bool SpatioTemporalVoxelLayer::updateFootprint(double robot_x, double robot_y, \
     touch(_transformed_footprint[i].x, _transformed_footprint[i].y, \
           min_x, min_y, max_x, max_y);
   }
+  return true;
 }
 
 /*****************************************************************************/