diff --git a/sys/boot/amd64/boot1.efi/Makefile b/sys/boot/amd64/boot1.efi/Makefile
index 3e3bc9fcc827..dd8eaf9e4cd5 100644
--- a/sys/boot/amd64/boot1.efi/Makefile
+++ b/sys/boot/amd64/boot1.efi/Makefile
@@ -51,7 +51,7 @@ boot1.efi: loader.sym
 	${OBJCOPY} -j .text -j .sdata -j .data \
 		-j .dynamic -j .dynsym -j .rel.dyn \
 		-j .rela.dyn -j .reloc -j .eh_frame -j set_Xcommand_set \
-		--target=${EFI_TARGET} ${.ALLSRC} ${.TARGET}
+		--output-target=${EFI_TARGET} ${.ALLSRC} ${.TARGET}
 
 CFLAGS+=	-I${.CURDIR}/../../common
 
diff --git a/sys/boot/amd64/efi/Makefile b/sys/boot/amd64/efi/Makefile
index a9a213227d0e..66b8cf868061 100644
--- a/sys/boot/amd64/efi/Makefile
+++ b/sys/boot/amd64/efi/Makefile
@@ -81,7 +81,7 @@ loader.efi: loader.sym
 	${OBJCOPY} -j .text -j .sdata -j .data \
 		-j .dynamic -j .dynsym -j .rel.dyn \
 		-j .rela.dyn -j .reloc -j .eh_frame -j set_Xcommand_set \
-		--target=${EFI_TARGET} ${.ALLSRC} ${.TARGET}
+		--output-target=${EFI_TARGET} ${.ALLSRC} ${.TARGET}
 
 LIBEFI=		${.OBJDIR}/../../efi/libefi/libefi.a
 CFLAGS+=	-I${.CURDIR}/../../common