diff --git a/bitbake/lib/bb/ui/hob.py b/bitbake/lib/bb/ui/hob.py
index df0ebe2328..865933c95a 100644
--- a/bitbake/lib/bb/ui/hob.py
+++ b/bitbake/lib/bb/ui/hob.py
@@ -155,6 +155,10 @@ class MainWindow (gtk.Window):
     def data_generated(self, handler):
         self.generating = False
         self.image_combo.set_model(self.model.images_model())
+        # Without this the image combo is incorrectly sized on first load of the GUI
+        self.image_combo.set_active(0)
+        self.image_combo.set_active(-1)
+
         if not self.image_combo_id:
             self.image_combo_id = self.image_combo.connect("changed", self.image_changed_cb)
         self.enable_widgets()