diff --git a/mote/v2/openwrt/package/flukso/luasrc/fluksod.lua b/mote/v2/openwrt/package/flukso/luasrc/fluksod.lua
index 0e2f68c..2fab932 100755
--- a/mote/v2/openwrt/package/flukso/luasrc/fluksod.lua
+++ b/mote/v2/openwrt/package/flukso/luasrc/fluksod.lua
@@ -67,6 +67,7 @@ local fds = { uart, ctrl, delta }
 
 local spidev = nixio.open(SPI_DEV, O_RDWR_NONBLOCK)
 nixio.spi.setspeed(spidev, SPI_MAX_CLK_SPEED_HZ, SPI_MIN_BYTE_DELAY_US)
+spidev:lock('lock')
 
 while true do
 	local msg