diff --git a/tryton/gui/window/view_form/view/form_gtk/checkbox.py b/tryton/gui/window/view_form/view/form_gtk/checkbox.py
index 25a8a75456..fb9f009569 100644
--- a/tryton/gui/window/view_form/view/form_gtk/checkbox.py
+++ b/tryton/gui/window/view_form/view/form_gtk/checkbox.py
@@ -8,6 +8,7 @@ class CheckBox(WidgetInterface):
         self.widget = gtk.CheckButton()
         self.widget.connect('focus-in-event', lambda x, y: self._focus_in())
         self.widget.connect('focus-out-event', lambda x, y: self._focus_out())
+        self.widget.connect_after('toggled', self.sig_activate)
 
     def _readonly_set(self, value):
         super(CheckBox, self)._readonly_set(value)