diff --git a/src/libslic3r/Model.cpp b/src/libslic3r/Model.cpp
index 35af84ff28..7bd59f669d 100644
--- a/src/libslic3r/Model.cpp
+++ b/src/libslic3r/Model.cpp
@@ -647,7 +647,6 @@ ModelMaterial* Model::add_material(t_model_material_id material_id, const ModelM
     return material;
 }
 
-// makes sure all objects have at least one instance
 bool Model::add_default_instances()
 {
     // apply a default position to all objects not having one
diff --git a/src/libslic3r/Model.hpp b/src/libslic3r/Model.hpp
index eacd7d8090..35333d6e2e 100644
--- a/src/libslic3r/Model.hpp
+++ b/src/libslic3r/Model.hpp
@@ -1632,6 +1632,7 @@ public:
 
     void          delete_material(t_model_material_id material_id);
     void          clear_materials();
+    // Make sure all objects have at least one instance
     bool          add_default_instances();
     // Returns approximate axis aligned bounding box of this model.
     BoundingBoxf3 bounding_box_approx() const;