diff --git a/gtk/gtkdropdown.c b/gtk/gtkdropdown.c
index 4d94d17e2c..6674a8ba35 100644
--- a/gtk/gtkdropdown.c
+++ b/gtk/gtkdropdown.c
@@ -88,7 +88,11 @@
  *   </items>
  * </object>
  * ]|
-
+ *
+ * * # CSS nodes
+ *
+ * GtkDropDown has a single CSS node with name dropdown,
+ * with the button and popover nodes as children.
  */
 
 struct _GtkDropDown
@@ -526,7 +530,7 @@ gtk_drop_down_class_init (GtkDropDownClass *klass)
   gtk_widget_class_bind_template_callback (widget_class, search_changed);
   gtk_widget_class_bind_template_callback (widget_class, search_stop);
 
-  gtk_widget_class_set_css_name (widget_class, I_("combobox"));
+  gtk_widget_class_set_css_name (widget_class, I_("dropdown"));
 }
 
 static void