diff --git a/boot/Kconfig b/boot/Kconfig
index 124f6db3e6e..dd047365754 100644
--- a/boot/Kconfig
+++ b/boot/Kconfig
@@ -1056,7 +1056,7 @@ config SYS_BOOTM_LEN
 	hex "Maximum size of a decompresed OS image"
 	depends on CMD_BOOTM || CMD_BOOTI || CMD_BOOTZ || \
 		LEGACY_IMAGE_FORMAT || SPL_LEGACY_IMAGE_FORMAT
-	default 0x4000000 if PPC || ARM64 || RISCV
+	default 0x8000000 if PPC || ARM64 || RISCV
 	default 0x1000000 if X86 || ARCH_MX6 || ARCH_MX7
 	default 0x800000
 	help