diff --git a/backup.sh b/backup.sh
index f5bd0bf..c2e068c 100755
--- a/backup.sh
+++ b/backup.sh
@@ -41,7 +41,7 @@ debug-log () {
   fi
 }
 
-while getopts 'a:cd:e:f:hi:l:m:o:p:qr:s:t:u:vw:' FLAG; do
+while getopts 'a:cd:e:f:hi:l:m:o:p:qr:s:t:u:vw:x:' FLAG; do
   case $FLAG in
     a) COMPRESSION_ALGORITHM=$OPTARG ;;
     c) ENABLE_CHAT_MESSAGES=true ;;