diff --git a/lib/extensions/amu/amu.mk b/lib/extensions/amu/amu.mk
index b4e04dd..0d203cb 100644
--- a/lib/extensions/amu/amu.mk
+++ b/lib/extensions/amu/amu.mk
@@ -4,5 +4,21 @@
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
+include lib/fconf/fconf.mk
+
 AMU_SOURCES	:=	lib/extensions/amu/${ARCH}/amu.c \
 			lib/extensions/amu/${ARCH}/amu_helpers.S
+
+ifneq (${ENABLE_AMU_AUXILIARY_COUNTERS},0)
+        ifeq (${ENABLE_AMU},0)
+                $(error AMU auxiliary counter support (`ENABLE_AMU_AUXILIARY_COUNTERS`) requires AMU support (`ENABLE_AMU`))
+        endif
+endif
+
+ifneq (${ENABLE_AMU_FCONF},0)
+        ifeq (${ENABLE_AMU_AUXILIARY_COUNTERS},0)
+                $(error AMU FCONF support (`ENABLE_AMU_FCONF`) is not necessary when auxiliary counter support (`ENABLE_AMU_AUXILIARY_COUNTERS`) is disabled)
+        endif
+
+        AMU_SOURCES	+=	${FCONF_AMU_SOURCES}
+endif