diff --git a/src/proto/charset.pro b/src/proto/charset.pro
index 2f64077..54af280 100644
--- a/src/proto/charset.pro
+++ b/src/proto/charset.pro
@@ -1,6 +1,7 @@
 /* charset.c */
 int init_chartab(void);
 int buf_init_chartab(buf_T *buf, int global);
+int check_isopt(char_u *isopt);
 void trans_characters(char_u *buf, int bufsize);
 char_u *transstr(char_u *s);
 char_u *str_foldcase(char_u *str, int orglen, char_u *buf, int buflen);
diff --git a/src/proto/optionstr.pro b/src/proto/optionstr.pro
index c034c11..561faa8 100644
--- a/src/proto/optionstr.pro
+++ b/src/proto/optionstr.pro
@@ -99,6 +99,7 @@
 int expand_set_highlight(optexpand_T *args, int *numMatches, char_u ***matches);
 char *did_set_iconstring(optset_T *args);
 char *did_set_imactivatekey(optset_T *args);
+char *did_set_iskeyword(optset_T *args);
 char *did_set_isopt(optset_T *args);
 char *did_set_jumpoptions(optset_T *args);
 int expand_set_jumpoptions(optexpand_T *args, int *numMatches, char_u ***matches);