diff --git a/src/proto/ui.pro b/src/proto/ui.pro
index 26cfd47..e920029 100644
--- a/src/proto/ui.pro
+++ b/src/proto/ui.pro
@@ -65,7 +65,7 @@
 void yank_cut_buffer0(Display *dpy, VimClipboard *cbd);
 int jump_to_mouse(int flags, int *inclusive, int which_button);
 int mouse_comp_pos(win_T *win, int *rowp, int *colp, linenr_T *lnump);
-win_T *mouse_find_win(int *rowp, int *colp);
+win_T *mouse_find_win(int *rowp, int *colp, mouse_find_T popup);
 int get_fpos_of_mouse(pos_T *mpos);
 int vcol2col(win_T *wp, linenr_T lnum, int vcol);
 void ui_focus_change(int in_focus);