diff --git a/include/arch/aarch64/arch.h b/include/arch/aarch64/arch.h
index c10102a..001fad5 100644
--- a/include/arch/aarch64/arch.h
+++ b/include/arch/aarch64/arch.h
@@ -1231,7 +1231,9 @@
 
 /* MPAM register definitions */
 #define MPAM3_EL3_MPAMEN_BIT		(ULL(1) << 63)
+#define MPAM3_EL3_TRAPLOWER_BIT		(ULL(1) << 62)
 #define MPAMHCR_EL2_TRAP_MPAMIDR_EL1	(ULL(1) << 31)
+#define MPAM3_EL3_RESET_VAL		MPAM3_EL3_TRAPLOWER_BIT
 
 #define MPAM2_EL2_TRAPMPAM0EL1		(ULL(1) << 49)
 #define MPAM2_EL2_TRAPMPAM1EL1		(ULL(1) << 48)