diff --git a/gtk/gtkdropdown.c b/gtk/gtkdropdown.c
index a7c48d5d87..7b169ba780 100644
--- a/gtk/gtkdropdown.c
+++ b/gtk/gtkdropdown.c
@@ -379,6 +379,7 @@ gtk_drop_down_size_allocate (GtkWidget *widget,
   gtk_widget_size_allocate (self->button, &(GtkAllocation) { 0, 0, width, height }, baseline);
 
   gtk_widget_set_size_request (self->popup, width, -1);
+  gtk_widget_queue_resize (self->popup);
 
   gtk_native_check_resize (GTK_NATIVE (self->popup));
 }