diff --git a/src/proto/gui_kde.pro b/src/proto/gui_kde.pro
index 3a52fa7..50671f4 100644
--- a/src/proto/gui_kde.pro
+++ b/src/proto/gui_kde.pro
@@ -1,4 +1,4 @@
-/* gui_kde.c */
+/* gui_kde.cc */
 void gui_mch_add_menu __ARGS((vimmenu_T *menu, int idx));
 void gui_mch_add_menu_item __ARGS((vimmenu_T *menu, int idx));
 void gui_mch_set_text_area_pos __ARGS((int x, int y, int w, int h));
@@ -16,4 +16,4 @@
 void gui_mch_replace_dialog __ARGS((exarg_T *eap));
 void ex_helpfind __ARGS((exarg_T *eap));
 void gui_make_popup __ARGS((char_u *path_name));
-/* vim: set ft=c : */
+/* vim: set ft=cpp : */
diff --git a/src/proto/gui_kde_x11.pro b/src/proto/gui_kde_x11.pro
index 7d968d9..c4eb5b0 100644
--- a/src/proto/gui_kde_x11.pro
+++ b/src/proto/gui_kde_x11.pro
@@ -1,4 +1,4 @@
-/* gui_kde_x11.c */
+/* gui_kde_x11.cc */
 void gui_mch_prepare __ARGS((int *argc, char **argv));
 void gui_mch_set_blinking __ARGS((long waittime, long on, long off));
 void gui_mch_stop_blink __ARGS((void));
@@ -59,4 +59,4 @@
 char_u *gui_mch_font_dialog __ARGS((char_u *oldval));
 void gui_mch_settitle __ARGS((char_u *title,char_u *icon));
 void gui_mch_update_codec __ARGS((void));
-/* vim: set ft=c : */
+/* vim: set ft=cpp : */
diff --git a/src/proto/mbyte.pro b/src/proto/mbyte.pro
index 9567a0a..88f14f4 100644
--- a/src/proto/mbyte.pro
+++ b/src/proto/mbyte.pro
@@ -47,6 +47,7 @@
 int utf_head_off __ARGS((char_u *base, char_u *p));
 int mb_off_next __ARGS((char_u *base, char_u *p));
 int mb_tail_off __ARGS((char_u *base, char_u *p));
+int utf_valid_string __ARGS((char_u *s, char_u *end));
 int dbcs_screen_tail_off __ARGS((char_u *base, char_u *p));
 void mb_adjust_cursor __ARGS((void));
 void mb_adjustpos __ARGS((pos_T *lp));
diff --git a/src/proto/os_win32.pro b/src/proto/os_win32.pro
index 2daa146..185c8ad 100644
--- a/src/proto/os_win32.pro
+++ b/src/proto/os_win32.pro
@@ -45,4 +45,9 @@
 FILE *mch_fopen __ARGS((char *name, char *mode));
 int mch_copy_file_attribute __ARGS((char_u *from, char_u *to));
 int myresetstkoflw __ARGS((void));
+int get_cmd_argsW __ARGS((char ***argvp));
+void free_cmd_argsW __ARGS((void));
+void used_file_arg __ARGS((char *name, int literal, int full_path));
+void set_alist_count __ARGS((void));
+void fix_arg_enc __ARGS((void));
 /* vim: set ft=c : */
diff --git a/src/proto/syntax.pro b/src/proto/syntax.pro
index b4dd3ea..82cebce 100644
--- a/src/proto/syntax.pro
+++ b/src/proto/syntax.pro
@@ -13,7 +13,7 @@
 int syn_get_id __ARGS((long lnum, long col, int trans));
 int syn_get_foldlevel __ARGS((win_T *wp, long lnum));
 void init_highlight __ARGS((int both, int reset));
-int load_colors __ARGS((char_u *p));
+int load_colors __ARGS((char_u *name));
 void do_highlight __ARGS((char_u *line, int forceit, int init));
 void restore_cterm_colors __ARGS((void));
 void set_normal_colors __ARGS((void));