diff --git a/src/os_win16.c b/src/os_win16.c
index 49e6e30..efddeeb 100644
--- a/src/os_win16.c
+++ b/src/os_win16.c
@@ -84,7 +84,7 @@
 /* cproto doesn't create a prototype for main() */
 int _cdecl
 VimMain
-__ARGS((int argc, char **argv));
+    (int argc, char **argv);
 static int (_cdecl *pmain)(int, char **);
 
 #ifndef PROTO