1 diff --git a/widget/gtk/mozwayland/mozwayland.c b/widget/gtk/mozwayland/mozwayland.c

     2 --- a/widget/gtk/mozwayland/mozwayland.c

     3 +++ b/widget/gtk/mozwayland/mozwayland.c

     4 @@ -200,3 +200,10 @@

     5  

     6  MOZ_EXPORT void wl_list_insert_list(struct wl_list* list,

     7                                      struct wl_list* other) {}

     8 +

     9 +MOZ_EXPORT struct wl_proxy* wl_proxy_marshal_flags(

    10 +    struct wl_proxy* proxy, uint32_t opcode,

    11 +    const struct wl_interface* interface, uint32_t version, uint32_t flags,

    12 +    ...) {

    13 +  return NULL;

    14 +}

    15