diff --git a/conf/machine/include/rpi-base.inc b/conf/machine/include/rpi-base.inc
index 688227c..71c63cb 100644
--- a/conf/machine/include/rpi-base.inc
+++ b/conf/machine/include/rpi-base.inc
@@ -51,7 +51,7 @@ KERNEL_DEVICETREE ?= " \
 #   within u-boot to load the kernel.
 KERNEL_BOOTCMD ??= "bootm"
 KERNEL_IMAGETYPE_UBOOT ??= "uImage"
-KERNEL_IMAGETYPE ?= "${@bb.utils.contains('RPI_USE_U_BOOT', '1', '${KERNEL_IMAGETYPE_UBOOT}', 'Image', d)}"
+KERNEL_IMAGETYPE ?= "${@bb.utils.contains('RPI_USE_U_BOOT', '1', '${KERNEL_IMAGETYPE_UBOOT}', 'zImage', d)}"
 
 MACHINE_FEATURES += "apm usbhost keyboard vfat ext2 screen touchscreen alsa bluetooth wifi sdio"