diff --git a/data/ui/window.ui b/data/ui/window.ui
index cf1d68dc..811a38ff 100644
--- a/data/ui/window.ui
+++ b/data/ui/window.ui
@@ -364,6 +364,7 @@
             <property name="can_focus">True</property>
             <property name="relief">none</property>
             <property name="receives_default">True</property>
+            <signal name="clicked" handler="open_source_dialog" object="GcalWindow" swapped="no" />
             <child>
               <object class="GtkBox" id="add_button_box">
                 <property name="visible">True</property>
diff --git a/src/gcal-window.c b/src/gcal-window.c
index 75885c57..76b42779 100644
--- a/src/gcal-window.c
+++ b/src/gcal-window.c
@@ -196,6 +196,9 @@ static void           remove_source                      (GcalManager         *m
                                                           ESource             *source,
                                                           gpointer             user_data);
 
+static void           show_source_dialog                 (GtkButton           *button,
+                                                          gpointer             user_data);
+
 static void           on_calendar_toggled                (GObject             *object,
                                                           GParamSpec          *pspec,
                                                           gpointer             user_data);
@@ -852,6 +855,15 @@ remove_source (GcalManager *manager,
   g_hash_table_remove (priv->calendar_source_to_row, source);
 }
 
+static void
+show_source_dialog (GtkButton *button,
+                    gpointer   user_data)
+{
+  GcalWindowPrivate *priv = gcal_window_get_instance_private (GCAL_WINDOW (user_data));
+
+  gtk_window_present (GTK_WINDOW (priv->source_dialog));
+}
+
 static void
 on_calendar_toggled (GObject    *object,
                      GParamSpec *pspec,
@@ -1313,6 +1325,8 @@ gcal_window_class_init(GcalWindowClass *klass)
   gtk_widget_class_bind_template_child_private (widget_class, GcalWindow, notification_action_button);
   gtk_widget_class_bind_template_child_private (widget_class, GcalWindow, notification_close_button);
 
+  gtk_widget_class_bind_template_callback (widget_class, show_source_dialog);
+
   gtk_widget_class_bind_template_callback (widget_class, key_pressed);
   gtk_widget_class_bind_template_callback (widget_class, search_toggled);
   gtk_widget_class_bind_template_callback (widget_class, search_changed);