diff --git a/tools/tune/common/sof_alsactl_write.m b/tools/tune/common/sof_alsactl_write.m
index b8676f7a0987..02bf9ec7dd27 100644
--- a/tools/tune/common/sof_alsactl_write.m
+++ b/tools/tune/common/sof_alsactl_write.m
@@ -28,6 +28,6 @@ function sof_alsactl_write(fn, blob8)
 for i=1:n_new-1
 	fprintf(fh, '%ld,', blob32(i));
 end
-fprintf(fh, '%ld,\n', blob32(end));
+fprintf(fh, '%ld\n', blob32(end));
 fclose(fh);
 end