diff --git a/src/proto/message.pro b/src/proto/message.pro
index 1c11444..34b3818 100644
--- a/src/proto/message.pro
+++ b/src/proto/message.pro
@@ -18,7 +18,7 @@
 char *msg_trunc_attr(char *s, int force, int attr);
 char_u *msg_may_trunc(int force, char_u *s);
 int delete_first_msg(void);
-void check_msg_hist(void);
+int messagesopt_changed(void);
 void ex_messages(exarg_T *eap);
 void msg_end_prompt(void);
 void wait_return(int redraw);
diff --git a/src/proto/option.pro b/src/proto/option.pro
index 8aa49c0..83f32aa 100644
--- a/src/proto/option.pro
+++ b/src/proto/option.pro
@@ -56,7 +56,6 @@
 char *did_set_modifiable(optset_T *args);
 char *did_set_modified(optset_T *args);
 char *did_set_mousehide(optset_T *args);
-char *did_set_msghistory(optset_T *args);
 char *did_set_number_relativenumber(optset_T *args);
 char *did_set_numberwidth(optset_T *args);
 char *did_set_paste(optset_T *args);
diff --git a/src/proto/optionstr.pro b/src/proto/optionstr.pro
index 561faa8..75a8d73 100644
--- a/src/proto/optionstr.pro
+++ b/src/proto/optionstr.pro
@@ -111,6 +111,8 @@
 char *did_set_lispoptions(optset_T *args);
 int expand_set_lispoptions(optexpand_T *args, int *numMatches, char_u ***matches);
 char *did_set_matchpairs(optset_T *args);
+char *did_set_messagesopt(optset_T *args);
+int expand_set_messagesopt(optexpand_T *args, int *numMatches, char_u ***matches);
 char *did_set_mkspellmem(optset_T *args);
 char *did_set_mouse(optset_T *args);
 int expand_set_mouse(optexpand_T *args, int *numMatches, char_u ***matches);