diff --git a/src/mainboard/google/brox/Kconfig b/src/mainboard/google/brox/Kconfig
index 74bea81..ce0f2e0 100644
--- a/src/mainboard/google/brox/Kconfig
+++ b/src/mainboard/google/brox/Kconfig
@@ -62,6 +62,8 @@
 
 config CHROMEOS
 	select EC_GOOGLE_CHROMEEC_SWITCHES
+	select GBB_FLAG_DISABLE_EC_SOFTWARE_SYNC
+	select GBB_FLAG_DISABLE_PD_SOFTWARE_SYNC
 	select HAS_RECOVERY_MRC_CACHE
 
 config CHROMEOS_WIFI_SAR