diff --git a/sources/GUI/ponytracker.glade b/sources/GUI/ponytracker.glade
index 46f234c..c0ad3f1 100644
--- a/sources/GUI/ponytracker.glade
+++ b/sources/GUI/ponytracker.glade
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.16.1 -->
 <interface>
-  <!-- interface-requires gtk+ 3.6 -->
+  <requires lib="gtk+" version="3.6"/>
   <object class="GtkWindow" id="ajoutinstrument">
     <property name="can_focus">False</property>
     <child>
@@ -376,6 +377,18 @@
                 <property name="relief">none</property>
                 <property name="focus_on_click">False</property>
                 <property name="orientation">vertical</property>
+                <child internal-child="plus_button">
+                  <object class="GtkButton" id="scalebutton-plus_button1">
+                    <property name="can_focus">False</property>
+                    <property name="receives_default">False</property>
+                  </object>
+                </child>
+                <child internal-child="minus_button">
+                  <object class="GtkButton" id="scalebutton-minus_button1">
+                    <property name="can_focus">False</property>
+                    <property name="receives_default">False</property>
+                  </object>
+                </child>
               </object>
               <packing>
                 <property name="left_attach">1</property>
@@ -392,6 +405,18 @@
                 <property name="relief">none</property>
                 <property name="focus_on_click">False</property>
                 <property name="orientation">vertical</property>
+                <child internal-child="plus_button">
+                  <object class="GtkButton" id="scalebutton-plus_button2">
+                    <property name="can_focus">False</property>
+                    <property name="receives_default">False</property>
+                  </object>
+                </child>
+                <child internal-child="minus_button">
+                  <object class="GtkButton" id="scalebutton-minus_button2">
+                    <property name="can_focus">False</property>
+                    <property name="receives_default">False</property>
+                  </object>
+                </child>
               </object>
               <packing>
                 <property name="left_attach">1</property>
@@ -1505,6 +1530,7 @@
   </object>
   <object class="GtkWindow" id="fenetreprincipale">
     <property name="can_focus">False</property>
+    <signal name="delete-event" handler="quitter" swapped="no"/>
     <child>
       <object class="GtkBox" id="box2">
         <property name="visible">True</property>
diff --git a/sources/main.c b/sources/main.c
index 521ebf5..06407a0 100644
--- a/sources/main.c
+++ b/sources/main.c
@@ -124,3 +124,8 @@ void lancerLecture ()
 	debut(melodie, liste, nbrPortees);
 	lecture(nbrPortees,melodie);
 }
+
+void quitter ()
+{
+	gtk_main_quit();
+}