diff --git a/include/lib/aarch32/arch.h b/include/lib/aarch32/arch.h
index 8525c7b..14212d5 100644
--- a/include/lib/aarch32/arch.h
+++ b/include/lib/aarch32/arch.h
@@ -46,6 +46,7 @@
 /*******************************************************************************
  * MPIDR macros
  ******************************************************************************/
+#define MPIDR_MT_MASK		(1 << 24)
 #define MPIDR_CPU_MASK		MPIDR_AFFLVL_MASK
 #define MPIDR_CLUSTER_MASK	(MPIDR_AFFLVL_MASK << MPIDR_AFFINITY_BITS)
 #define MPIDR_AFFINITY_BITS	8