1 files changed, 3 insertions, 3 deletions

diff --git a/conf/machine/include/qoriq-arm.inc b/conf/machine/include/qoriq-arm.inc
index eb03af432..cd6470ca0 100644
--- a/conf/machine/include/qoriq-arm.inc
+++ b/conf/machine/include/qoriq-arm.inc
@@ -1,9 +1,9 @@
 # Provides the common settings for QorIQ ARM
 
-KERNEL_IMAGETYPE ?= "uImage"
+KERNEL_IMAGETYPE ??= "uImage"
 
-SERIAL_CONSOLES ?= "115200;ttyS0 115200;ttyS1 115200;ttyEHV0 115200;ttyLP0 115200;ttyAMA0"
-SERIAL_CONSOLES_CHECK ?= "${SERIAL_CONSOLES}"
+SERIAL_CONSOLES ??= "115200;ttyS0 115200;ttyS1 115200;ttyEHV0 115200;ttyLP0 115200;ttyAMA0"
+SERIAL_CONSOLES_CHECK ??= "${SERIAL_CONSOLES}"
 
 MACHINEOVERRIDES =. "qoriq-arm:"