diff --git a/pc-bios/optionrom/Makefile b/pc-bios/optionrom/Makefile
index 54db882..bf5a2f3 100644
--- a/pc-bios/optionrom/Makefile
+++ b/pc-bios/optionrom/Makefile
@@ -13,7 +13,7 @@ CFLAGS += -I$(SRC_PATH)
 CFLAGS += $(call cc-option, $(CFLAGS), -fno-stack-protector)
 QEMU_CFLAGS = $(CFLAGS)
 
-build-all: multiboot.bin linuxboot.bin
+build-all: ../multiboot.bin ../linuxboot.bin
 
 %.img: %.o
 	$(call quiet-command,$(LD) -Ttext 0 -e _start -s -o $@ $<,"  Building $(TARGET_DIR)$@")
@@ -21,7 +21,7 @@ build-all: multiboot.bin linuxboot.bin
 %.raw: %.img
 	$(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@,"  Building $(TARGET_DIR)$@")
 
-%.bin: %.raw
+../%.bin: %.raw
 	$(call quiet-command,$(SHELL) $(SRC_PATH)/pc-bios/optionrom/signrom.sh $< $@,"  Signing $(TARGET_DIR)$@")
 
 clean: