diff --git a/src/proto/eval.pro b/src/proto/eval.pro
index c1dfbb8..83e10ab 100644
--- a/src/proto/eval.pro
+++ b/src/proto/eval.pro
@@ -11,6 +11,7 @@
 void eval_patch __ARGS((char_u *origfile, char_u *difffile, char_u *outfile));
 int eval_to_bool __ARGS((char_u *arg, int *error, char_u **nextcmd, int skip));
 char_u *eval_to_string_skip __ARGS((char_u *arg, char_u **nextcmd, int skip));
+int skip_expr __ARGS((char_u **pp));
 char_u *eval_to_string __ARGS((char_u *arg, char_u **nextcmd));
 char_u *eval_to_string_safe __ARGS((char_u *arg, char_u **nextcmd));
 int eval_to_number __ARGS((char_u *expr));
diff --git a/src/proto/ex_cmds.pro b/src/proto/ex_cmds.pro
index 33f105a..f63fcda 100644
--- a/src/proto/ex_cmds.pro
+++ b/src/proto/ex_cmds.pro
@@ -38,6 +38,7 @@
 void write_viminfo_sub_string __ARGS((FILE *fp));
 void prepare_tagpreview __ARGS((void));
 void ex_help __ARGS((exarg_T *eap));
+char_u *check_help_lang __ARGS((char_u *arg));
 int help_heuristic __ARGS((char_u *matched_string, int offset, int wrong_case));
 int find_help_tags __ARGS((char_u *arg, int *num_matches, char_u ***matches, int keep_lang));
 void fix_help_buffer __ARGS((void));