diff --git a/meta/recipes-bsp/u-boot/files/debian/rules.tmpl b/meta/recipes-bsp/u-boot/files/debian/rules.tmpl
index 806b01fe..a29ec9b1 100755
--- a/meta/recipes-bsp/u-boot/files/debian/rules.tmpl
+++ b/meta/recipes-bsp/u-boot/files/debian/rules.tmpl
@@ -3,7 +3,7 @@
 # Debian rules for custom U-Boot build
 #
 # This software is a part of ISAR.
-# Copyright (c) Siemens AG, 2018-2021
+# Copyright (c) Siemens AG, 2018-2023
 #
 # SPDX-License-Identifier: MIT
 
@@ -12,6 +12,9 @@ export CROSS_COMPILE=$(DEB_HOST_GNU_TYPE)-
 SET_CROSS_BUILD_TOOLS=CROSS_BUILD_TOOLS=y
 endif
 
+export KCFLAGS=${KCFLAGS}
+export HOSTCFLAGS=${HOSTCFLAGS}
+
 override_dh_auto_build:
 	$(MAKE) $(PARALLEL_MAKE) ${U_BOOT_CONFIG}
 	$(MAKE) $(PARALLEL_MAKE) ${U_BOOT_BIN}
diff --git a/meta/recipes-bsp/u-boot/u-boot-custom.inc b/meta/recipes-bsp/u-boot/u-boot-custom.inc
index 876eb361..1e9744b1 100644
--- a/meta/recipes-bsp/u-boot/u-boot-custom.inc
+++ b/meta/recipes-bsp/u-boot/u-boot-custom.inc
@@ -26,8 +26,11 @@ python() {
 
 DEBIAN_BUILD_DEPENDS ?= "bc, bison, flex, device-tree-compiler, git"
 
+KCFLAGS ?= ""
+HOSTCFLAGS ?= ""
+
 TEMPLATE_FILES = "debian/control.tmpl debian/rules.tmpl"
-TEMPLATE_VARS += "MACHINE DEBIAN_BUILD_DEPENDS U_BOOT_CONFIG U_BOOT_BIN"
+TEMPLATE_VARS += "MACHINE DEBIAN_BUILD_DEPENDS U_BOOT_CONFIG U_BOOT_BIN KCFLAGS HOSTCFLAGS"
 
 U_BOOT_TOOLS_PACKAGE ?= "0"
 U_BOOT_CONFIG_PACKAGE ?= "0"