diff --git a/gdk/gdkdnd.h b/gdk/gdkdnd.h
index f5ad51016a..8871b2a6b8 100644
--- a/gdk/gdkdnd.h
+++ b/gdk/gdkdnd.h
@@ -73,6 +73,7 @@ typedef enum
  * @GDK_DRAG_PROTO_WIN32_DROPFILES: The simple WM_DROPFILES protocol.
  * @GDK_DRAG_PROTO_OLE2: The complex OLE2 DND protocol (not implemented).
  * @GDK_DRAG_PROTO_LOCAL: Intra-application DND.
+ * @GDK_DRAG_PROTO_WAYLAND: Wayland DND protocol.
  *
  * Used in #GdkDragContext to indicate the protocol according to
  * which DND is done.
@@ -85,7 +86,8 @@ typedef enum
   GDK_DRAG_PROTO_ROOTWIN,
   GDK_DRAG_PROTO_WIN32_DROPFILES,
   GDK_DRAG_PROTO_OLE2,
-  GDK_DRAG_PROTO_LOCAL
+  GDK_DRAG_PROTO_LOCAL,
+  GDK_DRAG_PROTO_WAYLAND
 } GdkDragProtocol;