diff --git a/gtk/gtkcontainer.c b/gtk/gtkcontainer.c
index 888d9d59d2..04f8dc1c65 100644
--- a/gtk/gtkcontainer.c
+++ b/gtk/gtkcontainer.c
@@ -454,7 +454,7 @@ gtk_container_buildable_set_child_property (GtkContainer *container,
   GError *error = NULL;
   GObjectNotifyQueue *nqueue;
 
-  if (SPECIAL_CONTAINER (container))
+  if (SPECIAL_CONTAINER (container) && !GTK_IS_ASSISTANT (container))
     {
       /* This can happen with internal children of complex widgets.
        * Silently ignore the child properties in this case. We explicitly