diff --git a/lib/smux.h b/lib/smux.h
index 975cf8b..dd44a31 100644
--- a/lib/smux.h
+++ b/lib/smux.h
@@ -144,7 +144,7 @@
     (u_char *) &snmp_in_addr_val \
   )
 
-void smux_init (struct thread_master *tm, oid [], size_t);
+void smux_init (struct thread_master *tm);
 void smux_start (void);
 void smux_register_mib(const char *, struct variable *, size_t, int, oid [], size_t);
 int smux_header_generic (struct variable *, oid [], size_t *, int, size_t *,