diff --git a/src/proto/os_mac_conv.pro b/src/proto/os_mac_conv.pro
index e941788..e86e408 100644
--- a/src/proto/os_mac_conv.pro
+++ b/src/proto/os_mac_conv.pro
@@ -1,12 +1,12 @@
 /* os_mac_conv.c */
-char_u *mac_string_convert __ARGS((char_u *ptr, int len, int *lenp, int fail_on_error, int from_enc, int to_enc, int *unconvlenp));
-int macroman2enc __ARGS((char_u *ptr, long *sizep, long real_size));
-int enc2macroman __ARGS((char_u *from, size_t fromlen, char_u *to, int *tolenp, int maxtolen, char_u *rest, int *restlenp));
-void mac_conv_init __ARGS((void));
-void mac_conv_cleanup __ARGS((void));
-char_u *mac_utf16_to_enc __ARGS((unsigned short *from, size_t fromLen, size_t *actualLen));
-unsigned short *mac_enc_to_utf16 __ARGS((char_u *from, size_t fromLen, size_t *actualLen));
-void * mac_enc_to_cfstring __ARGS((char_u *from, size_t fromLen));
-char_u *mac_precompose_path __ARGS((char_u *decompPath, size_t decompLen, size_t *precompLen));
-void mac_lang_init __ARGS((void));
+char_u *mac_string_convert(char_u *ptr, int len, int *lenp, int fail_on_error, int from_enc, int to_enc, int *unconvlenp);
+int macroman2enc(char_u *ptr, long *sizep, long real_size);
+int enc2macroman(char_u *from, size_t fromlen, char_u *to, int *tolenp, int maxtolen, char_u *rest, int *restlenp);
+void mac_conv_init(void);
+void mac_conv_cleanup(void);
+char_u *mac_utf16_to_enc(unsigned short *from, size_t fromLen, size_t *actualLen);
+unsigned short *mac_enc_to_utf16(char_u *from, size_t fromLen, size_t *actualLen);
+void *mac_enc_to_cfstring(char_u *from, size_t fromLen);
+char_u *mac_precompose_path(char_u *decompPath, size_t decompLen, size_t *precompLen);
+void mac_lang_init(void);
 /* vim: set ft=c : */