diff --git a/src/crypt_zip.c b/src/crypt_zip.c
index 91bbd7b..89e4595 100644
--- a/src/crypt_zip.c
+++ b/src/crypt_zip.c
@@ -83,10 +83,7 @@
 crypt_zip_init(
     cryptstate_T    *state,
     char_u	    *key,
-    char_u	    *salt UNUSED,
-    int		    salt_len UNUSED,
-    char_u	    *seed UNUSED,
-    int		    seed_len UNUSED)
+    crypt_arg_T     *arg UNUSED)
 {
     char_u	*p;
     zip_state_T	*zs;