diff --git a/plugins/zfs/zfs_list b/plugins/zfs/zfs_list
index 5add8979..c7abf7da 100755
--- a/plugins/zfs/zfs_list
+++ b/plugins/zfs/zfs_list
@@ -33,7 +33,7 @@ fi
 if [ "$1" = "config" ]; then
 	for i in `zfs list -Hp | awk '{print $1}'`; do
 		values=( $(zfs get -p usedbydataset,usedbychildren,usedbysnapshots,usedbyrefreservation,available,quota $i | awk 'BEGIN {total=0;} { if( NR==1 ) next; } !/quota/ {total=total+$3;} {print $3} END{print total;}') )
-		fsname=$(clean_fieldname "$i")
+		fsname=$(clean_fieldname $(echo "$i" | sed 's/\//__/g'))
 
 		echo <<EOF "multigraph zfs_list_$fsname
 graph_title $fsname usage