diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk
index 77eb157..9e95cd5 100644
--- a/make_helpers/defaults.mk
+++ b/make_helpers/defaults.mk
@@ -133,6 +133,9 @@
 # platform Makefile is free to override this value.
 SEPARATE_CODE_AND_RODATA	:= 0
 
+# Default to SMCCC Version 1.X
+SMCCC_MAJOR_VERSION		:= 1
+
 # SPD choice
 SPD				:= none