diff --git a/conf/machine/colibri-vf.conf b/conf/machine/colibri-vf.conf
index 0c3ac0c..852902f 100644
--- a/conf/machine/colibri-vf.conf
+++ b/conf/machine/colibri-vf.conf
@@ -39,6 +39,6 @@ MKUBIFS_ARGS = " -c 8112 -e 124KiB -m 2KiB -F"
 UBINIZE_ARGS = " -p 128KiB -m 2048 -s 2048"
 UBI_VOLNAME = "rootfs"
 
-SERIAL_CONSOLE ?= "115200 ttyLP0"
+SERIAL_CONSOLE = "115200 ttyLP0"
 
 MACHINE_FEATURES += "usbgadget usbhost vfat alsa touchscreen"