diff --git a/target/u-boot/Makefile.in b/target/u-boot/Makefile.in
index ba30884c9..7b7bf1352 100644
--- a/target/u-boot/Makefile.in
+++ b/target/u-boot/Makefile.in
@@ -12,7 +12,7 @@ U_BOOT_CAT:=$(BZCAT)
 U_BOOT_BIN:=u-boot.bin
 U_BOOT_TOOLS_BIN:=mkimage
 # u-boot still uses arch=ppc for powerpc
-U_BOOT_ARCH=$(echo $(KERNEL_ARCH)|$(SED) 's/powerpc/ppc/')
+U_BOOT_ARCH:=$(shell echo $(KERNEL_ARCH)|$(HOST_SED_DIR)/bin/sed 's/powerpc/ppc/')
 
 ifneq ($(BR2_TARGET_U_BOOT_CONFIG_BOARD),)
 U_BOOT_INC_CONF_FILE:=$(U_BOOT_DIR)/include/configs/$(subst _config,,$(BR2_TARGET_U_BOOT_CONFIG_BOARD)).h
@@ -106,7 +106,7 @@ $(U_BOOT_DIR)/$(U_BOOT_BIN): $(U_BOOT_DIR)/.header_modified
 	$(TARGET_CONFIGURE_OPTS) \
 		CFLAGS="$(TARGET_CFLAGS)" \
 		LDFLAGS="$(TARGET_LDFLAGS)" \
-		$(MAKE) CROSS_COMPILE="$(TARGET_CROSS)" ARCH=$(KERNEL_ARCH) \
+		$(MAKE) CROSS_COMPILE="$(TARGET_CROSS)" ARCH=$(U_BOOT_ARCH) \
 		 -C $(U_BOOT_DIR)
 
 $(BINARIES_DIR)/$(U_BOOT_BIN): $(U_BOOT_DIR)/$(U_BOOT_BIN)