diff --git a/src/engine/include/models/mesh_frame.hpp b/src/engine/include/models/mesh_frame.hpp
index 6c33e89..9b57699 100644
--- a/src/engine/include/models/mesh_frame.hpp
+++ b/src/engine/include/models/mesh_frame.hpp
@@ -86,7 +86,7 @@ public:
      * Returns bounding box (AABB) vertex.
      * Total length: 8
      */
-    Vector3 &getBoundingBoxVertex(const u8 &i) { return boundingBoxObj->getVertex(i); };
+    const Vector3 &getBoundingBoxVertex(const u8 &i) { return boundingBoxObj->getVertex(i); };
 
     /**
      * Returns bounding box (AABB) object pointer.
diff --git a/src/engine/include/models/mesh_material.hpp b/src/engine/include/models/mesh_material.hpp
index 5099901..47cf64b 100644
--- a/src/engine/include/models/mesh_material.hpp
+++ b/src/engine/include/models/mesh_material.hpp
@@ -72,7 +72,7 @@ public:
      * Returns bounding box (AABB) vertex.
      * Total length: 8
      */
-    Vector3 &getBoundingBoxVertex(const u8 &i) { return boundingBoxObj->getVertex(i); };
+    const Vector3 &getBoundingBoxVertex(const u8 &i) { return boundingBoxObj->getVertex(i); };
 
     /**
      * Returns bounding box (AABB) object pointer.