diff --git a/image/prepare.sh b/image/prepare.sh
index 02f2e72..31cf6e2 100755
--- a/image/prepare.sh
+++ b/image/prepare.sh
@@ -50,6 +50,7 @@ case $(lsb_release -is) in
     ;;
   Debian)
     $minimal_apt_get_install locales locales-all
+    echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen
     ;;
   *)
     ;;