diff --git a/iso/initrd-override-amd64/lib/debian-installer-startup.d/S60auto-install b/iso/initrd-override-amd64/lib/debian-installer-startup.d/S60auto-install
new file mode 100755
index 0000000..b9701c0
--- /dev/null
+++ b/iso/initrd-override-amd64/lib/debian-installer-startup.d/S60auto-install
@@ -0,0 +1,17 @@
+#! /bin/sh
+
+. /usr/share/debconf/confmodule
+
+if db_get auto-install/enable && [ "$RET" = true ]; then
+	# find at least one preseed
+	if [ -e /preseed.cfg ] ||
+	   { db_get preseed/url  && [ "$RET" ]; } ||
+	   { db_get preseed/file && [ "$RET" ]; }; then
+		# disable locale & kbd selection
+		# commented by entr'ouvert # echo 1 >/var/run/auto-install.active
+		:
+	else
+		# register that no preseed was specified
+		touch /var/run/preseed_unspecified_at_boot
+	fi
+fi