diff --git a/Makefile b/Makefile
index 28f46b7..f6754bb 100755
--- a/Makefile
+++ b/Makefile
@@ -397,16 +397,15 @@ endif
 
 EXTRA_CFLAGS += -DDM_ODM_SUPPORT_TYPE=0x04
 
-ifeq ($(CONFIG_PLATFORM_I386_PC), y)
 EXTRA_CFLAGS += -DCONFIG_IOCTL_CFG80211 -DRTW_USE_CFG80211_STA_EVENT
 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/)
+SUBARCH := $(shell uname -m | sed -e s/ppc/powerpc/)
 ARCH ?= $(SUBARCH)
 CROSS_COMPILE ?=
 KVER  := $(shell uname -r)
 KSRC := /lib/modules/$(KVER)/build
 MODDESTDIR := /lib/modules/$(KVER)/kernel/drivers/net/wireless/
 INSTALL_PREFIX :=
-endif
 
 ifeq ($(CONFIG_MULTIDRV), y)