diff --git a/src/proto/userfunc.pro b/src/proto/userfunc.pro
index b8d1443..ad57855 100644
--- a/src/proto/userfunc.pro
+++ b/src/proto/userfunc.pro
@@ -38,6 +38,7 @@
 char_u *trans_function_name(char_u **pp, int *is_global, int skip, int flags, funcdict_T *fdp, partial_T **partial, type_T **type);
 char_u *untrans_function_name(char_u *name);
 char_u *get_scriptlocal_funcname(char_u *funcname);
+char_u *alloc_printable_func_name(char_u *fname);
 char_u *save_function_name(char_u **name, int *is_global, int skip, int flags, funcdict_T *fudi);
 void list_functions(regmatch_T *regmatch);
 ufunc_T *define_function(exarg_T *eap, char_u *name_arg, garray_T *lines_to_free);