diff --git a/include/arch/aarch32/arch.h b/include/arch/aarch32/arch.h
index da4ee7f..a711753 100644
--- a/include/arch/aarch32/arch.h
+++ b/include/arch/aarch32/arch.h
@@ -796,5 +796,6 @@
 #define DSU_CLUSTER_PWR_OFF	0
 #define DSU_CLUSTER_PWR_ON	1
 #define DSU_CLUSTER_PWR_MASK	U(1)
+#define DSU_CLUSTER_MEM_RET	BIT(1)
 
 #endif /* ARCH_H */