diff --git a/conf/machine/raspberrypi2.conf b/conf/machine/raspberrypi2.conf
index 9b4c02a..a17289c 100644
--- a/conf/machine/raspberrypi2.conf
+++ b/conf/machine/raspberrypi2.conf
@@ -7,7 +7,7 @@ DEFAULTTUNE ?= "cortexa7thf-neon-vfpv4"
 require conf/machine/include/tune-cortexa7.inc
 include conf/machine/include/rpi-base.inc
 
-SERIAL_CONSOLE = "115200 ttyAMA0"
+SERIAL_CONSOLE ?= "115200 ttyAMA0"
 
 UBOOT_MACHINE = "rpi_2_config"
 VC4_CMA_SIZE ?= "cma-256"