diff --git a/zfs_snapshot_cron.sh b/zfs_snapshot_cron.sh
index 2b454e6..ad7fa83 100755
--- a/zfs_snapshot_cron.sh
+++ b/zfs_snapshot_cron.sh
@@ -39,13 +39,13 @@ handle_pool() {
 		if [ $D -gt 0 ]; then
 			D=$(( D-1 ))
 			echo "KEEP; D: $D"
-		elif [ $W -gt 0 ] && [ ${scomp[3]} -eq 1 ]; then
+		elif [ $W -gt 0 ] && [ ${scomp[3]#0} -eq 1 ]; then
 			W=$(( W-1 ))
 			echo "KEEP; W: $W"
-		elif [ $M -gt 0 ] && [ ${scomp[3]} -eq 1 ] && [ $(( scomp[4] % 4 )) -eq 0 ]; then
+		elif [ $M -gt 0 ] && [ ${scomp[3]#0} -eq 1 ] && [ $(( ${scomp[4]#0} % 4 )) -eq 0 ]; then
 			M=$(( M-1 ))
 			echo "KEEP; M: $M"
-		elif [ $Y -gt 0 ] && [ ${scomp[3]} -eq 1 ] && [ ${scomp[4]} -eq 4 ]; then
+		elif [ $Y -gt 0 ] && [ ${scomp[3]#0} -eq 1 ] && [ ${scomp[4]#0} -eq 4 ]; then
 			Y=$(( Y-1 ))
 			echo "KEEP; Y: $Y"
 		else