diff --git a/xCAT/postscripts/xcatdsklspost b/xCAT/postscripts/xcatdsklspost
index a70f9542a..4787decf8 100755
--- a/xCAT/postscripts/xcatdsklspost
+++ b/xCAT/postscripts/xcatdsklspost
@@ -207,8 +207,12 @@ if [ $argnum -gt 0 ]; then
   echo "$TMP" > /tmp/mypostscript;
 fi
 
+# postscript name is specified with the updatenode
 if [ $argnum -gt 2 ]; then
   POSTS=$3
+  #remove all the postbootscripts
+  TMP=`sed "/postbootscripts-start-here/,/postbootscripts-end-here/ d" /tmp/mypostscript`
+  echo "$TMP" > /tmp/mypostscript
   #remove all the postscripts
   TMP=`sed "/postscripts-start-here/,/postscripts-end-here/ d" /tmp/mypostscript`
   echo "$TMP" > /tmp/mypostscript