--- uae/src/include/gensound.h	2018/04/24 16:49:05	1.1.1.5
+++ uae/src/include/gensound.h	2018/04/24 16:58:50	1.1.1.6
@@ -10,7 +10,11 @@
 extern int sound_available;
 
 extern void (*sample_handler) (void);
-extern unsigned long sample_evtime;
+/* sample_evtime is in normal Amiga cycles; scaled_sample_evtime is in our
+   event cycles.  scaled_sample_evtime_ok is set to 1 by init_sound if the
+   port understands scaled_sample_evtime and set it to something sensible.  */
+extern unsigned long sample_evtime, scaled_sample_evtime;
+extern int scaled_sample_evtime_ok;
 
 /* Determine if we can produce any sound at all.  This can be only a guess;
  * if unsure, say yes.  Any call to init_sound may change the value.  */