diff --git a/src/proto/crypt.pro b/src/proto/crypt.pro
index 2e58039..18382a7 100644
--- a/src/proto/crypt.pro
+++ b/src/proto/crypt.pro
@@ -5,6 +5,7 @@
 int crypt_get_method_nr(buf_T *buf);
 int crypt_whole_undofile(int method_nr);
 int crypt_get_header_len(int method_nr);
+int crypt_get_max_header_len(void);
 void crypt_set_cm_option(buf_T *buf, int method_nr);
 int crypt_self_test(void);
 cryptstate_T *crypt_create(int method_nr, char_u *key, char_u *salt, int salt_len, char_u *seed, int seed_len);
@@ -23,8 +24,6 @@
 char_u *crypt_get_key(int store, int twice);
 void crypt_append_msg(buf_T *buf);
 int crypt_sodium_init(cryptstate_T *state, char_u *key, char_u *salt, int salt_len, char_u *seed, int seed_len);
-void crypt_sodium_encode(cryptstate_T *state, char_u *from, size_t len, char_u *to, int last);
-void crypt_sodium_decode(cryptstate_T *state, char_u *from, size_t len, char_u *to, int last);
 long crypt_sodium_buffer_encode(cryptstate_T *state, char_u *from, size_t len, char_u **buf_out, int last);
 long crypt_sodium_buffer_decode(cryptstate_T *state, char_u *from, size_t len, char_u **buf_out, int last);
 /* vim: set ft=c : */