diff --git a/tryton/gui/window/wizard.py b/tryton/gui/window/wizard.py
index f299564a47..77ded24e82 100644
--- a/tryton/gui/window/wizard.py
+++ b/tryton/gui/window/wizard.py
@@ -417,6 +417,7 @@ class WizardDialog(Wizard, NoModal):
         else:
             width, height = -1, -1
         self.dia.set_default_size(max(200, width), height)
+        self.dia.resize(*self.dia.get_default_size())
         self.dia.show()
 
     def hide(self):