diff --git a/unattended.sh b/unattended.sh
index f400202..072cc99 100755
--- a/unattended.sh
+++ b/unattended.sh
@@ -1,7 +1,9 @@
 #!/usr/bin/env bash
 
 # Get password from user prompt and set it in preseed
-read -sp "Enter the root password: " ROOT_PASSWORD
+if [ -z "$ROOT_PASSWORD" ]; then
+  read -sp "Enter the root password: " ROOT_PASSWORD
+fi
 cp -f template.cfg preseed.cfg
 sed -i "s/ROOT_PASSWORD/${ROOT_PASSWORD}/" preseed.cfg