diff --git a/.buildbot/openwrt/build.sh b/.buildbot/openwrt/build.sh
index 5ebd28f..518fcf5 100755
--- a/.buildbot/openwrt/build.sh
+++ b/.buildbot/openwrt/build.sh
@@ -53,10 +53,7 @@ echo "CONFIG_TARGET_ROOTFS_EXT4FS=n" >> .config
 mkdir -p files/root/.ssh
 cp ${pwd}/authorized_keys files/root/.ssh/
 mkdir -p files/etc/uci-defaults
-cat << "EOF" > files/etc/uci-defaults/99-custom
-echo "PasswordAuthentication no" >> /etc/ssh/sshd_config
-/sbin/service sshd restart
-EOF
+cp ${pwd}/uci_defaults files/etc/uci-defaults/99-custom
 
 PACKAGES="kmod-nf-nathelper-extra kmod-rtc-ds1307 \
 	  kmod-usb-audio kmod-usb-net-rtl8152 \
diff --git a/uci_defaults b/uci_defaults
new file mode 100644
index 0000000..2e6727a
--- /dev/null
+++ b/uci_defaults
@@ -0,0 +1,2 @@
+echo "PasswordAuthentication no" >> /etc/ssh/sshd_config
+/sbin/service sshd restart
\ No newline at end of file