diff --git a/pc-bios/optionrom/Makefile b/pc-bios/optionrom/Makefile
index b3f487b6b6..ace142d292 100644
--- a/pc-bios/optionrom/Makefile
+++ b/pc-bios/optionrom/Makefile
@@ -1,7 +1,7 @@
 all: build-all
 
 include ../../config-host.mak
-include ../../rules.mak
+include $(SRC_PATH)/rules.mak
 
 VPATH=$(SRC_PATH)/pc-bios/optionrom