diff --git a/tryton/gui/window/view_form/view/form_gtk/reference.py b/tryton/gui/window/view_form/view/form_gtk/reference.py
index 6c5325a5fe..2228d495a9 100644
--- a/tryton/gui/window/view_form/view/form_gtk/reference.py
+++ b/tryton/gui/window/view_form/view/form_gtk/reference.py
@@ -25,7 +25,7 @@ class Reference(WidgetInterface):
         child.connect('changed',
                 self.sig_changed_combo)
         child.connect('key_press_event', self.sig_key_pressed)
-        self.widget_combo.set_size_request(int(attrs.get('size', -1)), -1)
+        self.widget_combo.set_size_request(int(attrs.get('widget_size', -1)), -1)
         self.widget.pack_start(self.widget_combo, expand=False, fill=True)
 
         self.widget.pack_start(gtk.Label('-'), expand=False, fill=False)
diff --git a/tryton/gui/window/view_form/view/form_gtk/selection.py b/tryton/gui/window/view_form/view/form_gtk/selection.py
index 86e7f9d025..5450e7d149 100644
--- a/tryton/gui/window/view_form/view/form_gtk/selection.py
+++ b/tryton/gui/window/view_form/view/form_gtk/selection.py
@@ -17,7 +17,7 @@ class Selection(WidgetInterface):
         child.connect('button_press_event', self._menu_open)
         child.connect('activate', self.sig_activate)
         child.connect_after('focus-out-event', self.sig_activate)
-        self.entry.set_size_request(int(attrs.get('size', -1)), -1)
+        self.entry.set_size_request(int(attrs.get('widget_size', -1)), -1)
         self.widget.pack_start(self.entry, expand=True, fill=True)
 
         self._selection = {}