diff --git a/src/proto/getchar.pro b/src/proto/getchar.pro
index e504a95..7183eaf 100644
--- a/src/proto/getchar.pro
+++ b/src/proto/getchar.pro
@@ -21,6 +21,7 @@
 int start_redo_ins __ARGS((void));
 void stop_redo_ins __ARGS((void));
 int ins_typebuf __ARGS((char_u *str, int noremap, int offset, int nottyped, int silent));
+void ins_char_typebuf __ARGS((int c));
 int typebuf_changed __ARGS((int tb_change_cnt));
 int typebuf_typed __ARGS((void));
 int typebuf_maplen __ARGS((void));