diff --git a/src/proto/crypt.pro b/src/proto/crypt.pro
index 18382a7..682fe45 100644
--- a/src/proto/crypt.pro
+++ b/src/proto/crypt.pro
@@ -26,4 +26,6 @@
 int crypt_sodium_init(cryptstate_T *state, char_u *key, char_u *salt, int salt_len, char_u *seed, int seed_len);
 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);
+int crypt_sodium_munlock(void *const addr, const size_t len);
+void crypt_sodium_randombytes_buf(void *const buf, const size_t size);
 /* vim: set ft=c : */