diff --git a/sequencer.cpp b/sequencer.cpp
index e5ffada..4b5f01f 100644
--- a/sequencer.cpp
+++ b/sequencer.cpp
@@ -39,7 +39,7 @@ void sequencer_part1(void)
 
   for (uint8_t d = 0; d < NUM_SEQ_TRACKS; d++)
   {
-    if (seq_patternchain[seq_chain_active_step][d] != 99 )  // sequence not empty
+    if (seq_patternchain[seq_chain_active_step][d] < NUM_SEQ_PATTERN )  // sequence not empty or muted
     {
       if ( seq_track_type[d] == 0)
       { // drum track (drum samples and pitched one-shot samples)