diff --git a/egs/wsj/s5/steps/train_mono.sh b/egs/wsj/s5/steps/train_mono.sh
index 7a6c29008dd..141d128c329 100755
--- a/egs/wsj/s5/steps/train_mono.sh
+++ b/egs/wsj/s5/steps/train_mono.sh
@@ -22,6 +22,7 @@ stage=-4
 power=0.25 # exponent to determine number of gaussians from occurrence counts
 norm_vars=false # deprecated, prefer --cmvn-opts "--norm-vars=false"
 cmvn_opts=  # can be used to add extra options to cmvn.
+delta_opts= # can be used to add extra options to add-deltas
 # End configuration section.
 
 echo "$0 $@"  # Print the command line for logging
@@ -54,8 +55,9 @@ cp $lang/phones.txt $dir || exit 1;
 
 $norm_vars && cmvn_opts="--norm-vars=true $cmvn_opts"
 echo $cmvn_opts  > $dir/cmvn_opts # keep track of options to CMVN.
+[ ! -z $delta_opts ] && echo $delta_opts > $dir/delta_opts # keep track of options to delta
 
-feats="ark,s,cs:apply-cmvn $cmvn_opts --utt2spk=ark:$sdata/JOB/utt2spk scp:$sdata/JOB/cmvn.scp scp:$sdata/JOB/feats.scp ark:- | add-deltas ark:- ark:- |"
+feats="ark,s,cs:apply-cmvn $cmvn_opts --utt2spk=ark:$sdata/JOB/utt2spk scp:$sdata/JOB/cmvn.scp scp:$sdata/JOB/feats.scp ark:- | add-deltas $delta_opts ark:- ark:- |"
 example_feats="`echo $feats | sed s/JOB/1/g`";
 
 echo "$0: Initializing monophone system."