diff --git a/gnu/usr.bin/binutils/libbinutils/Makefile b/gnu/usr.bin/binutils/libbinutils/Makefile
index 07e77b8e4fe3..ac6a5b9ec612 100644
--- a/gnu/usr.bin/binutils/libbinutils/Makefile
+++ b/gnu/usr.bin/binutils/libbinutils/Makefile
@@ -9,7 +9,12 @@ SRCS+=	arlex.l arparse.y arsup.c bucomm.c debug.c filemode.c \
 	ieee.c rdcoff.c rddbg.c rename.c stabs.c unwind-ia64.c \
 	wrstabs.c version.c binemul.c budemang.c emul_vanilla.c
 WARNS=	0
-CFLAGS+= -DTARGET=\"${TARGET_ARCH}-unknown-freebsd\"
+.if ${TARGET_ARCH} == "amd64"
+BINUTILS_ARCH=x86_64
+.else
+BINUTILS_ARCH=${TARGET_ARCH}
+.endif
+CFLAGS+= -DTARGET=\"${BINUTILS_ARCH}-unknown-freebsd\"
 CFLAGS+= -DBFD_VERSION_STRING=\"${VERSION}\"
 CFLAGS+= -I${SRCDIR}/binutils
 CFLAGS+= -I${SRCDIR}/bfd