diff --git a/src/proto/ops.pro b/src/proto/ops.pro
index 193e894..bebe635 100644
--- a/src/proto/ops.pro
+++ b/src/proto/ops.pro
@@ -14,6 +14,7 @@
 char_u *skip_comment(char_u *line, int process, int include_space, int *is_comment);
 int do_join(long count, int insert_space, int save_undo, int use_formatoptions, int setmark);
 void block_prep(oparg_T *oap, struct block_def *bdp, linenr_T lnum, int is_del);
+void charwise_block_prep(pos_T start, pos_T end, struct block_def *bdp, linenr_T lnum, int inclusive);
 void op_addsub(oparg_T *oap, linenr_T Prenum1, int g_cmd);
 void clear_oparg(oparg_T *oap);
 void cursor_pos_info(dict_T *dict);