diff --git a/gtk/gtkstyleset.c b/gtk/gtkstyleset.c
index 15db395a00..f1b0b35709 100644
--- a/gtk/gtkstyleset.c
+++ b/gtk/gtkstyleset.c
@@ -80,6 +80,7 @@ gtk_style_set_class_init (GtkStyleSetClass *klass)
   gtk_style_set_register_property ("font", PANGO_TYPE_FONT_DESCRIPTION, NULL);
 
   gtk_style_set_register_property ("padding", GTK_TYPE_BORDER, NULL);
+  gtk_style_set_register_property ("border", G_TYPE_INT, NULL);
 
   g_value_init (&val, GTK_TYPE_THEMING_ENGINE);
   g_value_set_object (&val, (GObject *) gtk_theming_engine_load (NULL));