diff --git a/src/proto/getchar.pro b/src/proto/getchar.pro
index bf131a5..cb8b750 100644
--- a/src/proto/getchar.pro
+++ b/src/proto/getchar.pro
@@ -51,4 +51,5 @@
 void vungetc(int c);
 int fix_input_buffer(char_u *buf, int len);
 int input_available(void);
+char_u *getcmdkeycmd(int promptc, void *cookie, int indent, getline_opt_T do_concat);
 /* vim: set ft=c : */