diff --git a/plat/mediatek/mt8173/drivers/spm/spm.c b/plat/mediatek/mt8173/drivers/spm/spm.c
index f67daea..7c6d72b 100644
--- a/plat/mediatek/mt8173/drivers/spm/spm.c
+++ b/plat/mediatek/mt8173/drivers/spm/spm.c
@@ -53,7 +53,8 @@
 static int spm_dormant_sta = CPU_DORMANT_RESET;
 #endif
 
-static bakery_lock_t spm_lock __attribute__ ((section("tzfw_coherent_mem")));
+DEFINE_BAKERY_LOCK(spm_lock);
+
 static int spm_hotplug_ready __attribute__ ((section("tzfw_coherent_mem")));
 static int spm_mcdi_ready __attribute__ ((section("tzfw_coherent_mem")));
 static int spm_suspend_ready __attribute__ ((section("tzfw_coherent_mem")));