diff --git jni/mdxmini/src/mdxmml_ym2151.c jni/mdxmini/src/mdxmml_ym2151.c
index 4594762..cc9ca7c 100755
--- jni/mdxmini/src/mdxmml_ym2151.c
+++ jni/mdxmini/src/mdxmml_ym2151.c
@@ -1041,6 +1041,7 @@ set_plfo( int track, int v1, int v2, int v3, int v4, int v5, songdata *data )
   if ( v1 > 4  ) d*=256;
   /*fprintf(stderr,"%d %d %d %d\n", track, v1, t, d);fflush(stderr);*/
   mdx->track[track].p_lfo_form  = v1;
+  if (t < 2) t = 2; /* HACK to prevent zero division, no idea what's correct */
   mdx->track[track].p_lfo_clock = t;
   mdx->track[track].p_lfo_depth = d;
   mdx->track[track].p_lfo_flag  = FLAG_TRUE;
@@ -1092,6 +1093,7 @@ set_alfo( int track, int v1, int v2, int v3, int v4, int v5, songdata *data )
     d = d-0x10000;
   }
   mdx->track[track].a_lfo_form  = v1;
+  if (t < 2) t = 2; /* HACK to prevent zero division, no idea what's correct */
   mdx->track[track].a_lfo_clock = t;
   mdx->track[track].a_lfo_depth = d;
   mdx->track[track].a_lfo_flag  = FLAG_TRUE;