diff --git a/Makefile b/Makefile
index 1501f46..f899dac 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2013-2020, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2013-2021, ARM Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -1018,6 +1018,7 @@
         SPM_MM \
         SPMD_SPM_AT_SEL2 \
         TRUSTED_BOARD_BOOT \
+        TRNG_SUPPORT \
         USE_COHERENT_MEM \
         USE_DEBUGFS \
         ARM_IO_IN_DTB \