--- a/libpurple/protocols/zephyr/ZCkAuth.c	Tue Jan 21 10:33:37 2025 -0600
+++ b/libpurple/protocols/zephyr/ZCkAuth.c	Tue Jan 21 10:44:24 2025 -0600
@@ -18,9 +18,8 @@
    When not using Kerberos, return true if the notice claims to be authentic.
    Only used by clients; the server uses its own routine.
  */
-Code_t ZCheckAuthentication(notice, from)
-    ZNotice_t *notice;
-    struct sockaddr_in *from;
+Code_t
+ZCheckAuthentication(ZNotice_t *notice, struct sockaddr_in *from)
 {
 #ifdef ZEPHYR_USES_KERBEROS
     int result;