diff --git a/board/radxa/rock5b/genimage.cfg b/board/radxa/rock5b/genimage.cfg
index 43bb65bdd9..070cc03dc2 100644
--- a/board/radxa/rock5b/genimage.cfg
+++ b/board/radxa/rock5b/genimage.cfg
@@ -11,8 +11,15 @@ image sdcard.img {
 		offset = 32K
 	}
 
+	partition uboot-env {
+		partition-type-uuid = 3de21764-95bd-54bd-a5c3-4abe786f38a8
+		offset = 16M
+		size = 64K
+	}
+
 	partition rootfs {
 		partition-type-uuid = L
 		image = "rootfs.ext2"
+		bootable = true
 	}
 }
diff --git a/board/radxa/rock5b/u-boot.fragment b/board/radxa/rock5b/u-boot.fragment
new file mode 100644
index 0000000000..ceba8d609a
--- /dev/null
+++ b/board/radxa/rock5b/u-boot.fragment
@@ -0,0 +1,5 @@
+CONFIG_ENV_SIZE=0x10000
+CONFIG_PARTITION_TYPE_GUID=y
+# CONFIG_ENV_IS_NOWHERE is not set
+CONFIG_ENV_IS_IN_MMC=y
+CONFIG_SYS_MMC_ENV_DEV=1
diff --git a/configs/rock5b_defconfig b/configs/rock5b_defconfig
index d75ad585fb..af748a5d25 100644
--- a/configs/rock5b_defconfig
+++ b/configs/rock5b_defconfig
@@ -34,6 +34,7 @@ BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
 BR2_TARGET_UBOOT_CUSTOM_VERSION=y
 BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2024.10"
 BR2_TARGET_UBOOT_BOARD_DEFCONFIG="rock5b-rk3588"
+BR2_TARGET_UBOOT_CONFIG_FRAGMENT_FILES="board/radxa/rock5b/u-boot.fragment"
 BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y
 BR2_TARGET_UBOOT_NEEDS_PYELFTOOLS=y
 BR2_TARGET_UBOOT_NEEDS_OPENSSL=y