diff --git a/variants/union.sh b/variants/union.sh
index 8ecfe87dbeefad6f691385763a1c9315b6ff2854..a02cd2c2dbd7e3d3b0c95094704bd8cec43cb670 100755
--- a/variants/union.sh
+++ b/variants/union.sh
@@ -48,6 +48,8 @@ for i in ${dir}/*.vcf.gz; do
 done 
 
 echo "##fileformat=VCFv4.2" > header.vcf
+echo "##INFO=<ID=CallSet,Number='.',Type=String,Description=\"Caller\">" >> header.vcf
+echo "##INFO=<ID=CallSetInconsistent,Number=1,Type=Integer,Description=\"Caller Inconsistency Manual Inspection\">" >> header.vcf
 zcat ${dir}/*.vcf.gz |grep "##" |grep -v '#fileformat' |sort -u |grep 'ALT\|FILTER\|FORMAT\|INFO' >> header.vcf
 
 perl $baseDir/unionvcf.pl header.vcf $list2