diff --git a/tryton/common/button.py b/tryton/common/button.py
index 2adae35ba6..5a695e8cc3 100644
--- a/tryton/common/button.py
+++ b/tryton/common/button.py
@@ -17,6 +17,11 @@ class Button(gtk.Button):
         self._set_icon(attrs.get('icon'))
 
     def _set_icon(self, stock):
+        image = self.get_image()
+        if not image and not stock:
+            return
+        elif image and image.get_stock()[0] == stock:
+            return
         if not stock:
             self.set_image(gtk.Image())
             return