diff --git a/src/mainboard/amd/bilby/Makefile.inc b/src/mainboard/amd/bilby/Makefile.inc
index b7a1c237d4..1a812adb09 100644
--- a/src/mainboard/amd/bilby/Makefile.inc
+++ b/src/mainboard/amd/bilby/Makefile.inc
@@ -13,5 +13,3 @@ endif
 ifeq ($(CONFIG_BOARD_AMD_BILBY),y)
 APCB_SOURCES = $(MAINBOARD_BLOBS_DIR)/APCB_bilby.bin
 endif
-
-CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/acpi