diff -Nur audacious-plugins-2.2-orig/src/amidi-plug/i_midi.c audacious-plugins-2.2-amidi/src/amidi-plug/i_midi.c
--- audacious-plugins-2.2-orig/src/amidi-plug/i_midi.c	2009-11-22 23:49:52.000000000 +0100
+++ audacious-plugins-2.2-amidi/src/amidi-plug/i_midi.c	2010-03-16 10:41:24.000000000 +0100
@@ -659,8 +659,10 @@
   /* IMPORTANT
      this couple of important values is set by i_midi_set_length */
   mf->length = length_microsec;
-  mf->avg_microsec_per_tick = (gint)(length_microsec / mf->max_tick);
-
+  if (mf->max_tick)
+      mf->avg_microsec_per_tick = (gint)(length_microsec / mf->max_tick);
+  else
+      mf->avg_microsec_per_tick = 1;  /* dummy - protect against div-by-zero */
   return;
 }