diff --git a/src/proto/buffer.pro b/src/proto/buffer.pro
index 5e1aa7a..1748fb5 100644
--- a/src/proto/buffer.pro
+++ b/src/proto/buffer.pro
@@ -61,6 +61,7 @@
 int bt_terminal(buf_T *buf);
 int bt_help(buf_T *buf);
 int bt_prompt(buf_T *buf);
+int bt_popup(buf_T *buf);
 int bt_nofile(buf_T *buf);
 int bt_dontwrite(buf_T *buf);
 int bt_dontwrite_msg(buf_T *buf);
diff --git a/src/proto/popupwin.pro b/src/proto/popupwin.pro
new file mode 100644
index 0000000..a3d78b8
--- /dev/null
+++ b/src/proto/popupwin.pro
@@ -0,0 +1,7 @@
+/* popupwin.c */
+void f_popup_create(typval_T *argvars, typval_T *rettv);
+void f_popup_close(typval_T *argvars, typval_T *rettv);
+void popup_close(int nr);
+void close_all_popups(void);
+void ex_popupclear(exarg_T *eap);
+/* vim: set ft=c : */
diff --git a/src/proto/window.pro b/src/proto/window.pro
index b4ad98a..b5cbf69 100644
--- a/src/proto/window.pro
+++ b/src/proto/window.pro
@@ -19,7 +19,8 @@
 void curwin_init(void);
 void win_init_empty(win_T *wp);
 int win_alloc_first(void);
-void win_alloc_aucmd_win(void);
+win_T *win_alloc_popup_win(void);
+void win_init_popup_win(win_T *wp, buf_T *buf);
 void win_init_size(void);
 void free_tabpage(tabpage_T *tp);
 int win_new_tabpage(int after);
@@ -42,6 +43,8 @@
 void win_enter(win_T *wp, int undo_sync);
 win_T *buf_jump_open_win(buf_T *buf);
 win_T *buf_jump_open_tab(buf_T *buf);
+int win_unlisted(win_T *wp);
+void win_free_popup(win_T *win);
 void win_append(win_T *after, win_T *wp);
 void win_remove(win_T *wp, tabpage_T *tp);
 int win_alloc_lines(win_T *wp);