diff --git a/projects/S905/filesystem/usr/share/bttty.conf b/projects/S905/filesystem/usr/share/bttty.conf
new file mode 100644
index 0000000000..9b8c4a20e1
--- /dev/null
+++ b/projects/S905/filesystem/usr/share/bttty.conf
@@ -0,0 +1 @@
+BTTTY="/dev/ttyS1"