diff --git a/Window.py b/Window.py
index 3d4f3be..bdec0ab 100644
--- a/Window.py
+++ b/Window.py
@@ -44,7 +44,7 @@ class Window:
 
         self.status_lbl = gtk.Label()
         self.status_lbl.set_alignment(0.0, 0.5)
-        self.sketch_status_icon = gtk.Label()
+        self.sketch_status_icon = gtk.Image()
         self.sketch_status_text = gtk.Label()
         self.statusbar = gtk.HBox()
         self.statusbar.pack_start(self.status_lbl, expand = True)
@@ -95,4 +95,7 @@ class Window:
             raise ValueError('Unknown mode')
 
     def update_sketch_status(self, valid, text):
+        stock_name = gtk.STOCK_YES if valid else gtk.STOCK_NO
+        size = gtk.ICON_SIZE_SMALL_TOOLBAR
+        self.sketch_status_icon.set_from_stock(stock_name, size)
         self.sketch_status_text.set_text(text)