diff --git a/tools/helpers/flashall b/tools/helpers/flashall
index 13b79c2..2f6d16f 100644
--- a/tools/helpers/flashall
+++ b/tools/helpers/flashall
@@ -2,7 +2,7 @@
 # Just so you dont have to write.
 # Reboot the modem into fastboot mode
 # flash kernel + rootfs and reboot
-sudo echo -ne "AT+QFASTBOOT\r" > /dev/ttyUSB2
+sudo su -c 'echo -ne "AT+QFASTBOOT\r" > /dev/ttyUSB2'
 fastboot oem stay
 fastboot flash aboot appsboot.mbn
 fastboot reboot-bootloader