diff --git a/gtk/gtkeditablelabel.c b/gtk/gtkeditablelabel.c
index f1d18c7917..687de40348 100644
--- a/gtk/gtkeditablelabel.c
+++ b/gtk/gtkeditablelabel.c
@@ -460,7 +460,7 @@ gtk_editable_label_start_editing (GtkEditableLabel *self)
   gtk_stack_set_visible_child_name (GTK_STACK (self->stack), "entry");
   gtk_widget_grab_focus (self->entry);
 
-  gtk_widget_add_css_class (self, "editing");
+  gtk_widget_add_css_class (GTK_WIDGET (self), "editing");
 
   g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_EDITING]);
 }
@@ -499,7 +499,7 @@ gtk_editable_label_stop_editing (GtkEditableLabel *self,
 
   gtk_widget_grab_focus (GTK_WIDGET (self));
 
-  gtk_widget_remove_css_class (self, "editing");
+  gtk_widget_remove_css_class (GTK_WIDGET (self), "editing");
 
   g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_EDITING]);
 }