diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 472394d43..65cf326df 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -614,10 +614,10 @@ struct Sidebar::priv
     PresetComboBox *combo_printer;
 
     wxBoxSizer *sizer_params;
-    FreqChangedParams   *frequently_changed_parameters;
-    ObjectList          *object_list;
-    ObjectManipulation  *object_manipulation;
-    ObjectSettings      *object_settings;
+    FreqChangedParams   *frequently_changed_parameters{ nullptr };
+    ObjectList          *object_list{ nullptr };
+    ObjectManipulation  *object_manipulation{ nullptr };
+    ObjectSettings      *object_settings{ nullptr };
     ObjectInfo *object_info;
     SlicedInfo *sliced_info;
 
@@ -626,10 +626,23 @@ struct Sidebar::priv
     wxButton *btn_send_gcode;
 
     priv(Plater *plater) : plater(plater) {}
+    ~priv();
 
     void show_preset_comboboxes();
 };
 
+Sidebar::priv::~priv()
+{
+    if (object_manipulation != nullptr)
+        delete object_manipulation;
+
+    if (object_settings != nullptr)
+        delete object_settings;
+
+    if (frequently_changed_parameters != nullptr)
+        delete frequently_changed_parameters;
+}
+
 void Sidebar::priv::show_preset_comboboxes()
 {
     const bool showSLA = wxGetApp().preset_bundle->printers.get_edited_preset().printer_technology() == ptSLA;