diff --git a/src/proto/sha256.pro b/src/proto/sha256.pro
index 464b354..157fa73 100644
--- a/src/proto/sha256.pro
+++ b/src/proto/sha256.pro
@@ -1,9 +1,9 @@
 /* sha256.c */
-void sha256_start __ARGS((context_sha256_T *ctx));
-void sha256_update __ARGS((context_sha256_T *ctx, char_u *input, UINT32_T length));
-void sha256_finish __ARGS((context_sha256_T *ctx, char_u digest[32]));
-char_u *sha256_bytes __ARGS((char_u *buf, int buf_len, char_u *salt, int salt_len));
-char_u *sha256_key __ARGS((char_u *buf, char_u *salt, int salt_len));
-int sha256_self_test __ARGS((void));
-void sha2_seed __ARGS((char_u *header, int header_len, char_u *salt, int salt_len));
+void sha256_start(context_sha256_T *ctx);
+void sha256_update(context_sha256_T *ctx, char_u *input, UINT32_T length);
+void sha256_finish(context_sha256_T *ctx, char_u digest[32]);
+char_u *sha256_bytes(char_u *buf, int buf_len, char_u *salt, int salt_len);
+char_u *sha256_key(char_u *buf, char_u *salt, int salt_len);
+int sha256_self_test(void);
+void sha2_seed(char_u *header, int header_len, char_u *salt, int salt_len);
 /* vim: set ft=c : */