diff --git a/src/proto/scriptfile.pro b/src/proto/scriptfile.pro
index 24e5389..dbcc849 100644
--- a/src/proto/scriptfile.pro
+++ b/src/proto/scriptfile.pro
@@ -9,7 +9,7 @@
 void set_context_in_runtime_cmd(expand_T *xp, char_u *arg);
 int find_script_by_name(char_u *name);
 int get_new_scriptitem_for_fname(int *error, char_u *fname);
-int do_in_path(char_u *path, char_u *name, int flags, void (*callback)(char_u *fname, void *ck), void *cookie);
+int do_in_path(char_u *path, char *prefix, char_u *name, int flags, void (*callback)(char_u *fname, void *ck), void *cookie);
 int do_in_runtimepath(char_u *name, int flags, void (*callback)(char_u *fname, void *ck), void *cookie);
 int source_runtime(char_u *name, int flags);
 int source_in_path(char_u *path, char_u *name, int flags, int *ret_sid);