diff --git a/src/proto/evalwindow.pro b/src/proto/evalwindow.pro
index c201a2e..e3faa96 100644
--- a/src/proto/evalwindow.pro
+++ b/src/proto/evalwindow.pro
@@ -19,6 +19,7 @@
 void f_win_id2tabwin(typval_T *argvars, typval_T *rettv);
 void f_win_id2win(typval_T *argvars, typval_T *rettv);
 void f_win_screenpos(typval_T *argvars, typval_T *rettv);
+void f_win_splitmove(typval_T *argvars, typval_T *rettv);
 void f_winbufnr(typval_T *argvars, typval_T *rettv);
 void f_wincol(typval_T *argvars, typval_T *rettv);
 void f_winheight(typval_T *argvars, typval_T *rettv);