diff --git a/gtk/src/gtk_preferences.cpp b/gtk/src/gtk_preferences.cpp
index 8522a90a..7295417c 100644
--- a/gtk/src/gtk_preferences.cpp
+++ b/gtk/src/gtk_preferences.cpp
@@ -792,8 +792,9 @@ void Snes9xPreferences::show()
         dialog->show();
         auto result = dialog->run();
 
-        config->preferences_width = get_width();
-        config->preferences_height = get_height();
+        auto box = get_object<Gtk::Widget>("preferences_box");
+        config->preferences_width = box->get_width();
+        config->preferences_height = box->get_height();
         config->current_display_tab = get_object<Gtk::Notebook>("display_notebook")->get_current_page();
 
         switch (result)
diff --git a/gtk/src/gtk_s9xwindow.cpp b/gtk/src/gtk_s9xwindow.cpp
index c2e8dd45..d6145c26 100644
--- a/gtk/src/gtk_s9xwindow.cpp
+++ b/gtk/src/gtk_s9xwindow.cpp
@@ -491,8 +491,9 @@ bool Snes9xWindow::draw(const Cairo::RefPtr<Cairo::Context> &cr)
 
     if (!(config->fullscreen) && !(maximized_state))
     {
-        config->window_width = get_width();
-        config->window_height = get_height();
+        auto vbox = get_object<Gtk::VBox>("main_window_vbox");
+        config->window_width = vbox->get_width();
+        config->window_height = vbox->get_height();
     }
 
     if (last_width < 0)
diff --git a/gtk/src/gtk_shader_parameters.cpp b/gtk/src/gtk_shader_parameters.cpp
index 164335b0..40cf4402 100644
--- a/gtk/src/gtk_shader_parameters.cpp
+++ b/gtk/src/gtk_shader_parameters.cpp
@@ -28,9 +28,8 @@ static inline double snap_to_interval(double value, double interval)
 
 static void dialog_response(int response_id)
 {
-    gui_config->shader_parameters_width = dialog->get_width();
-    gui_config->shader_parameters_height = dialog->get_height();
-
+    gui_config->shader_parameters_width = dialog->get_vbox()->get_width();
+    gui_config->shader_parameters_height = dialog->get_vbox()->get_height();
     switch (response_id)
     {
     case Gtk::RESPONSE_OK:
diff --git a/gtk/src/snes9x.ui b/gtk/src/snes9x.ui
index ad2023f9..6f43bb5e 100644
--- a/gtk/src/snes9x.ui
+++ b/gtk/src/snes9x.ui
@@ -1180,7 +1180,7 @@
     <signal name="focus-out-event" handler="focus_out_event" swapped="no"/>
     <signal name="focus-in-event" handler="focus_in_event" swapped="no"/>
     <child>
-      <object class="GtkVBox" id="vbox1">
+      <object class="GtkVBox" id="main_window_vbox">
         <property name="visible">True</property>
         <property name="can_focus">False</property>
         <child>
@@ -2685,7 +2685,7 @@
     <signal name="style-set" handler="style_set" swapped="no"/>
     <signal name="key-press-event" handler="on_key_press" swapped="no"/>
     <child internal-child="vbox">
-      <object class="GtkVBox" id="dialog-vbox1">
+      <object class="GtkVBox" id="preferences_box">
         <property name="visible">True</property>
         <property name="can_focus">False</property>
         <property name="spacing">2</property>