diff --git a/arm11/Makefile b/arm11/Makefile
index f7536a6..1b8a179 100644
--- a/arm11/Makefile
+++ b/arm11/Makefile
@@ -25,7 +25,7 @@ SOURCES		:=	../libn3ds/kernel/source ../libn3ds/source ../libn3ds/source/drivers
 DATA		:=
 INCLUDES	:=	../libn3ds/include ../libn3ds/include/arm11 ../libn3ds/kernel/include ../libn3ds/thirdparty ../include \
 				../thirdparty
-DEFINES		:=	-DARM11 -D_3DS -DLIBN3DS_LEGACY=1 -DVERS_STRING=\"$(VERS_STRING)\" \
+DEFINES		:=	-D__ARM11__ -D_3DS -DLIBN3DS_LEGACY=1 -DVERS_STRING=\"$(VERS_STRING)\" \
 				-DVERS_MAJOR=$(VERS_MAJOR) -DVERS_MINOR=$(VERS_MINOR)
 ASSETS		:=
 
diff --git a/arm9/Makefile b/arm9/Makefile
index 220d1d0..90bff5f 100644
--- a/arm9/Makefile
+++ b/arm9/Makefile
@@ -22,7 +22,7 @@ SOURCES		:=	../libn3ds/source ../libn3ds/source/drivers/mmc ../libn3ds/source/dr
 				../libn3ds/source/arm9/drivers ../libn3ds/thirdparty/fatfs ../source/arm9
 DATA		:=
 INCLUDES	:=	../libn3ds/include ../libn3ds/include/arm9 ../libn3ds/thirdparty ../include ../thirdparty
-DEFINES		:=	-DARM9 -D_3DS -DLIBN3DS_LEGACY=1 -DVERS_STRING=\"$(VERS_STRING)\" \
+DEFINES		:=	-D__ARM9__ -D_3DS -DLIBN3DS_LEGACY=1 -DVERS_STRING=\"$(VERS_STRING)\" \
 				-DVERS_MAJOR=$(VERS_MAJOR) -DVERS_MINOR=$(VERS_MINOR)
 
 ifneq ($(strip $(NO_DEBUG)),)