diff --git a/src/mainboard/google/rex/mainboard.c b/src/mainboard/google/rex/mainboard.c
index d59d3d4..619ca71 100644
--- a/src/mainboard/google/rex/mainboard.c
+++ b/src/mainboard/google/rex/mainboard.c
@@ -103,7 +103,7 @@
 {
 	const struct device *wwan = DEV_PTR(rp6_wwan);
 
-	if (wwan) {
+	if (is_dev_enabled(wwan)) {
 		acpigen_write_scope("\\_SB");
 		acpigen_write_method_serialized("MPTS", 1);
 		mainboard_generate_wwan_shutdown(wwan);