diff --git a/nav2_route/include/nav2_route/node_spatial_tree.hpp b/nav2_route/include/nav2_route/node_spatial_tree.hpp
index 15d9e2a5528..744d30791c7 100644
--- a/nav2_route/include/nav2_route/node_spatial_tree.hpp
+++ b/nav2_route/include/nav2_route/node_spatial_tree.hpp
@@ -55,7 +55,9 @@ struct GraphAdaptor
 };
 
 typedef nanoflann::KDTreeSingleIndexAdaptor<
-    nanoflann::L2_Simple_Adaptor<double, GraphAdaptor>, GraphAdaptor, DIMENSION> kd_tree_t;
+    nanoflann::L2_Simple_Adaptor<double, GraphAdaptor>, GraphAdaptor, DIMENSION,
+    unsigned int>
+  kd_tree_t;
 
 /**
  * @class nav2_route::NodeSpatialTree