diff --git a/lib/extensions/amu/amu.mk b/lib/extensions/amu/amu.mk
new file mode 100644
index 0000000..b4e04dd
--- /dev/null
+++ b/lib/extensions/amu/amu.mk
@@ -0,0 +1,8 @@
+#
+# Copyright (c) 2021, Arm Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+AMU_SOURCES	:=	lib/extensions/amu/${ARCH}/amu.c \
+			lib/extensions/amu/${ARCH}/amu_helpers.S