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-rw-r--r--make_helpers/defaults.mk3
1 files changed, 3 insertions, 0 deletions
diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk
index 4af1da6b2c..fff336cd21 100644
--- a/make_helpers/defaults.mk
+++ b/make_helpers/defaults.mk
@@ -204,6 +204,9 @@ USE_DEBUGFS := 0
# Build option to choose whether Trusted Firmware uses library at ROM
USE_ROMLIB := 0
+# Chain of trust.
+COT := tbbr
+
# Use tbbr_oid.h instead of platform_oid.h
USE_TBBR_DEFS := 1