diff --git a/nodemgmt-scripts.sh b/nodemgmt-scripts.sh
index fe697763..5929051f 100755
--- a/nodemgmt-scripts.sh
+++ b/nodemgmt-scripts.sh
@@ -684,9 +684,9 @@ DOWNLIST(){
 				fi
 		
 				if [ -f ${NM_TMPFOLDER}/${ditem}.errtime ]; then
-					toterrtime=`date +%s`-$(stat -c %Y ${NM_TMPFOLDER}/${ditem}.errtime)
+					toterrtime=`expr $(date +%s) - $(stat -c %Y ${NM_TMPFOLDER}/${ditem}.errtime)`
 				else
-					toterrtime=`date +%s`-$(stat -c %Y ${NM_TMPFOLDER}/${ditem}.down)
+					toterrtime=`expr $(date +%s) - $(stat -c %Y ${NM_TMPFOLDER}/${ditem}.down)`
 				fi
 		
 				c=0; spc=''; spc1=${cw}-${#itemname}