diff --git a/include/arch/aarch64/arch.h b/include/arch/aarch64/arch.h
index 10fe926..90569c3 100644
--- a/include/arch/aarch64/arch.h
+++ b/include/arch/aarch64/arch.h
@@ -342,6 +342,7 @@
 #define SCR_EEL2_BIT		(U(1) << 18)
 #define SCR_API_BIT		(U(1) << 17)
 #define SCR_APK_BIT		(U(1) << 16)
+#define SCR_TERR_BIT		(U(1) << 15)
 #define SCR_TWE_BIT		(U(1) << 13)
 #define SCR_TWI_BIT		(U(1) << 12)
 #define SCR_ST_BIT		(U(1) << 11)