diff --git a/gtk/gtkcombobox.c b/gtk/gtkcombobox.c
index 6f564604e7..fb96edc097 100644
--- a/gtk/gtkcombobox.c
+++ b/gtk/gtkcombobox.c
@@ -4579,7 +4579,6 @@ gtk_combo_box_constructor (GType                  type,
   GObject            *object;
   GtkComboBox        *combo_box;
   GtkComboBoxPrivate *priv;
-  GtkStyleContext    *context;
 
   object = G_OBJECT_CLASS (gtk_combo_box_parent_class)->constructor
     (type, n_construct_properties, construct_properties);
@@ -4602,9 +4601,6 @@ gtk_combo_box_constructor (GType                  type,
 
   gtk_combo_box_check_appearance (combo_box);
 
-  context = gtk_widget_get_style_context (GTK_WIDGET (combo_box));
-  gtk_style_context_add_class (context, GTK_STYLE_CLASS_BUTTON);
-
   if (priv->has_entry)
     {
       GtkWidget *entry;