diff --git a/arch/x86/timer/Makefile b/arch/x86/timer/Makefile
index 167717d1663..c5823414995 100644
--- a/arch/x86/timer/Makefile
+++ b/arch/x86/timer/Makefile
@@ -1,5 +1,10 @@
 EXTRA_CFLAGS +=-I$(srctree)/include/drivers
+ifeq (${CONFIG_BSP_GENERIC_PC},y)
 EXTRA_CFLAGS +=-I$(srctree)/arch/x86/generic_pc
+endif
+ifeq (${CONFIG_BSP_QUARK},y)
+EXTRA_CFLAGS +=-I$(srctree)/arch/x86/quark
+endif
 EXTRA_CFLAGS +=-I$(srctree)/arch/x86
 
 obj-$(CONFIG_HPET_TIMER) += hpet.o