diff --git a/recipes-bsp/u-boot/files/maxsize.cfg b/recipes-bsp/u-boot/files/maxsize.cfg
new file mode 100644
index 0000000..1b09831
--- /dev/null
+++ b/recipes-bsp/u-boot/files/maxsize.cfg
@@ -0,0 +1 @@
+CONFIG_SYS_BOOTM_LEN=0x1000000
diff --git a/recipes-bsp/u-boot/u-boot_%.bbappend b/recipes-bsp/u-boot/u-boot_%.bbappend
index 8c707b5..5dcd940 100644
--- a/recipes-bsp/u-boot/u-boot_%.bbappend
+++ b/recipes-bsp/u-boot/u-boot_%.bbappend
@@ -5,6 +5,7 @@ SRC_URI:append:rpi = " \
 "
 
 SRC_URI:append:rpi = " file://0001-rpi-always-set-fdt_addr-with-firmware-provided-FDT-address.patch"
+SRC_URI:append:raspberrypi4 = " file://maxsize.cfg"
 
 DEPENDS:append:rpi = " u-boot-default-script"