diff --git a/salt/telegraf/scripts/suriloss.sh b/salt/telegraf/scripts/suriloss.sh
index c9e9d478e..48745c161 100644
--- a/salt/telegraf/scripts/suriloss.sh
+++ b/salt/telegraf/scripts/suriloss.sh
@@ -15,7 +15,9 @@ if [ $CHECKIT == 2 ]; then
   else
     CURRENTPACKETS=${RESULT[9]}
     PASTPACKETS=${RESULT[19]}
-    TOTAL=$(($CURRENTPACKETS - $PASTPACKETS + $DROPPED))
+    TOTALCURRENT=$(($CURRENTPACKETS + $CURRENTDROP))
+    TOTALPAST=$(($PASTPACKETS + $PASTDROP))
+    TOTAL=$(($TOTALCURRENT - $TOTALPAST))
 
     LOSS=$(echo $DROPPED $TOTAL / p | dc)
     echo "suridrop drop=$LOSS"