--- main/event.c.orig
+++ main/event.c
@@ -15,7 +15,7 @@
 
 /* time for next event - update vdp_event - return when to call again */
 
-inline void event_nextevent(void)
+static inline void event_nextevent(void)
 {
   /* call this when it *is* time for the next event as dictated by vdp_event,
      so we switch on it and update vdp_event at the same time */