diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk
index 4344cf8..8705d92 100644
--- a/make_helpers/defaults.mk
+++ b/make_helpers/defaults.mk
@@ -307,6 +307,7 @@
 
 ENABLE_AMU			:= 0
 ENABLE_AMU_AUXILIARY_COUNTERS	:= 0
+ENABLE_AMU_FCONF		:= 0
 AMU_RESTRICT_COUNTERS		:= 0
 
 # By default, enable Scalable Vector Extension if implemented only for Non-secure