diff --git a/wally/suits/io/defaults_qd.cfg b/wally/suits/io/defaults_qd.cfg
index c3dee19..ee10055 100644
--- a/wally/suits/io/defaults_qd.cfg
+++ b/wally/suits/io/defaults_qd.cfg
@@ -21,5 +21,6 @@
 write_bw_log=fio_bw_log
 log_avg_msec=1000
 write_hist_log=fio_lat_hist_log
+log_hist_coarseness=0
 log_hist_msec=1000
 log_unix_epoch=1