diff --git a/src/soc/intel/cannonlake/Kconfig b/src/soc/intel/cannonlake/Kconfig
index a54ef90..c4855da 100644
--- a/src/soc/intel/cannonlake/Kconfig
+++ b/src/soc/intel/cannonlake/Kconfig
@@ -119,6 +119,7 @@
 	select USE_FSP_NOTIFY_PHASE_POST_PCI_ENUM
 	select USE_FSP_NOTIFY_PHASE_READY_TO_BOOT
 	select USE_FSP_NOTIFY_PHASE_END_OF_FIRMWARE
+	select X86_CLFLUSH_CAR
 
 config MAX_CPUS
 	int