diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk
index 595ba7b..72f5e33 100644
--- a/make_helpers/defaults.mk
+++ b/make_helpers/defaults.mk
@@ -139,6 +139,12 @@
 # Flag to enable access to the HAFGRTR_EL2 register
 ENABLE_FEAT_AMUv1		:= 0
 
+# Flag to enable access to the HDFGRTR_EL2 register
+ENABLE_FEAT_FGT			:= 0
+
+# Flag to enable access to the CNTPOFF_EL2 register
+ENABLE_FEAT_ECV			:= 0
+
 # By default BL31 encryption disabled
 ENCRYPT_BL31			:= 0