diff --git a/src/GUI/Plater.cpp b/src/GUI/Plater.cpp
index 68ad6b5ed..499267e98 100644
--- a/src/GUI/Plater.cpp
+++ b/src/GUI/Plater.cpp
@@ -328,7 +328,7 @@ std::vector<int> Plater::load_model_objects(ModelObjectPtrs model_objects) {
 
 MainFrame* Plater::GetFrame() { return dynamic_cast<MainFrame*>(wxGetTopLevelParent(this)); }
 
-int Plater::get_object_index(size_t object_id) {
+int Plater::get_object_index(ObjIdx object_id) {
     for (size_t i = 0U; i < this->objects.size(); i++) {
         if (this->objects.at(i).identifier == object_id) return static_cast<int>(i);
     }
diff --git a/src/GUI/Plater.hpp b/src/GUI/Plater.hpp
index a91053a8b..c73899b13 100644
--- a/src/GUI/Plater.hpp
+++ b/src/GUI/Plater.hpp
@@ -28,7 +28,8 @@
 namespace Slic3r { namespace GUI {
 
 using UndoOperation = int;
-using obj_index = unsigned int;
+using ObjIdx = unsigned int;
+using ObjRef = std::vector<PlaterObject>::iterator;
 
 class PlaterObject;
 class Plate2D;
@@ -99,8 +100,13 @@ private:
     /// Method to get the top-level window and cast it as a MainFrame.
     MainFrame* GetFrame();
 
-    void select_object(size_t& obj_idx) { };
-    int get_object_index(size_t object_id);
+    void select_object(ObjRef obj_idx);
+    void select_object(ObjIdx obj_idx);
+
+    /// Overload to unselect objects
+    void select_object();
+    
+    int get_object_index(ObjIdx object_id);
 
     /// Get the center of the configured bed's bounding box.
     Slic3r::Pointf bed_centerf() {