diff --git a/bin/v-backup-user b/bin/v-backup-user
index 88a00cab..9e6a425c 100755
--- a/bin/v-backup-user
+++ b/bin/v-backup-user
@@ -54,6 +54,15 @@ start_time=$(date '+%s')
 subj="$user → backup failed"
 email=$(grep CONTACT $VESTA/data/users/admin/user.conf |cut -f 2 -d \')
 
+# Validate available disk space (take usage * 2, due to the backup handling)
+let u_disk=$(grep "U_DISK=" $VESTA/data/users/$user/user.conf |cut -f 2 -d \')*2
+let v_disk=$(($(stat -f --format="%a*%S" $BACKUP)))/1024/1024
+
+if [ "$u_disk" -gt "$v_disk" ]; then
+    echo "not enough diskspace available to perform the backup." |$SENDMAIL -s "$subj" $email $notify
+    check_result $E_LIMIT "not enough diskspace available to perform the backup."
+fi
+
 if [ -z "$BACKUP_TEMP" ]; then
     BACKUP_TEMP=$BACKUP
 fi