diff --git a/src/mainboard/google/octopus/variants/fleex/variant.c b/src/mainboard/google/octopus/variants/fleex/variant.c
index 52f822a6c4..1b0784c030 100644
--- a/src/mainboard/google/octopus/variants/fleex/variant.c
+++ b/src/mainboard/google/octopus/variants/fleex/variant.c
@@ -1,10 +1,11 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <acpi/acpi.h>
-#include <ec/google/chromeec/ec.h>
 #include <baseboard/variants.h>
 #include <delay.h>
+#include <ec/google/chromeec/ec.h>
 #include <gpio.h>
+#include <sar.h>
 
 void variant_smi_sleep(u8 slp_typ)
 {
@@ -15,3 +16,14 @@ void variant_smi_sleep(u8 slp_typ)
 
 	power_off_lte_module();
 }
+
+const char *get_wifi_sar_cbfs_filename(void)
+{
+	const char *filename = NULL;
+	uint32_t sku_id = google_chromeec_get_board_sku();
+
+	if (sku_id != 4)
+		filename = "wifi_sar-fleex.hex";
+
+	return filename;
+}