diff --git a/Makefile b/Makefile
index 6c07ef9..aa57f85 100644
--- a/Makefile
+++ b/Makefile
@@ -147,6 +147,9 @@ CONFIG_PLATFORM_HISILICON = n
 
 CONFIG_DRVEXT_MODULE = n
 
+SUBARCH := $(shell uname -m | sed -e "s/i.86/i386/; s/ppc.*/powerpc/; s/armv.l/arm/; s/aarch64/arm64/; s/riscv../riscv/;")
+ARCH ?= $(SUBARCH)
+
 export TopDIR ?= $(shell pwd)
 
 ########### COMMON  #################################
@@ -992,8 +995,6 @@ EXTRA_CFLAGS += -DDM_ODM_SUPPORT_TYPE=0x04
 ifeq ($(CONFIG_PLATFORM_I386_PC), y)
 EXTRA_CFLAGS += -DCONFIG_LITTLE_ENDIAN
 EXTRA_CFLAGS += -DCONFIG_IOCTL_CFG80211 -DRTW_USE_CFG80211_STA_EVENT
-SUBARCH := $(shell uname -m | sed -e s/i.86/i386/)
-ARCH ?= $(SUBARCH)
 CROSS_COMPILE ?=
 KVER  := $(shell uname -r)
 KSRC := /lib/modules/$(KVER)/build