diff --git a/src/proto/move.pro b/src/proto/move.pro
index e6a0601..3dd6ec1 100644
--- a/src/proto/move.pro
+++ b/src/proto/move.pro
@@ -30,6 +30,7 @@
 void curs_columns(int may_scroll);
 void textpos2screenpos(win_T *wp, pos_T *pos, int *rowp, int *scolp, int *ccolp, int *ecolp);
 void f_screenpos(typval_T *argvars, typval_T *rettv);
+void f_virtcol2col(typval_T *argvars, typval_T *rettv);
 void scrolldown(long line_count, int byfold);
 void scrollup(long line_count, int byfold);
 void check_topfill(win_T *wp, int down);