diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk
index f63e46f..66c2af4 100644
--- a/make_helpers/defaults.mk
+++ b/make_helpers/defaults.mk
@@ -214,6 +214,11 @@
     override ENABLE_SPE_FOR_LOWER_ELS := 0
 endif
 
+# Include Memory Tagging Extension registers in cpu context. This must be set
+# to 1 if the platform wants to use this feature in the Secure world and MTE is
+# enabled at ELX.
+CTX_INCLUDE_MTE_REGS := 0
+
 ENABLE_AMU			:= 0
 
 # By default, enable Scalable Vector Extension if implemented for Non-secure