diff --git a/src/proto/sign.pro b/src/proto/sign.pro
index 6470f52..ef9f71a 100644
--- a/src/proto/sign.pro
+++ b/src/proto/sign.pro
@@ -11,6 +11,7 @@
 int sign_define_by_name(char_u *name, char_u *icon, char_u *linehl, char_u *text, char_u *texthl);
 int sign_undefine_by_name(char_u *name);
 int sign_place(int *sign_id, char_u *sign_group, char_u *sign_name, buf_T *buf, linenr_T lnum, int prio);
+linenr_T sign_jump(int sign_id, char_u *sign_group, buf_T *buf);
 int sign_unplace(int sign_id, char_u *sign_group, buf_T *buf, linenr_T atlnum);
 void ex_sign(exarg_T *eap);
 void sign_getlist(char_u *name, list_T *retlist);