Index: head/sys/boot/efi/Makefile.inc
===================================================================
--- head/sys/boot/efi/Makefile.inc	(revision 301705)
+++ head/sys/boot/efi/Makefile.inc	(revision 301706)
@@ -1,21 +1,25 @@
 # $FreeBSD$
 
 BINDIR?=	/boot
 
 .if ${MACHINE_CPUARCH} == "i386"
 CFLAGS+=        -march=i386
 CFLAGS+=	-mno-aes
 .endif
 
 # Options used when building app-specific efi components
 # See conf/kern.mk for the correct set of these
 CFLAGS+=	-ffreestanding -Wformat -msoft-float ${CFLAGS_NO_SIMD}
 LDFLAGS+=	-nostdlib
 
 .if ${MACHINE_CPUARCH} == "amd64"
 CFLAGS+=	-fshort-wchar
 CFLAGS+=	-mno-red-zone
 CFLAGS+=	-mno-aes
 .endif
 
+.if ${MACHINE_CPUARCH} == "aarch64"
+CFLAGS+=	-fshort-wchar
+.endif
+
 .include "../Makefile.inc"