diff --git a/tryton/gui/window/view_form/view/form_gtk/parser.py b/tryton/gui/window/view_form/view/form_gtk/parser.py
index 3647243e18..bad60d3afc 100644
--- a/tryton/gui/window/view_form/view/form_gtk/parser.py
+++ b/tryton/gui/window/view_form/view/form_gtk/parser.py
@@ -24,7 +24,7 @@ class Button(object):
             try:
                 stock = attrs['icon']
                 icon = gtk.Image()
-                icon.set_from_stock(stock, gtk.ICON_SIZE_BUTTON)
+                icon.set_from_stock(stock, gtk.ICON_SIZE_SMALL_TOOLBAR)
                 self.widget.set_image(icon)
             except Exception:
                 import logging