diff --git a/include/lib/extensions/amu_private.h b/include/lib/extensions/amu_private.h
new file mode 100644
index 0000000..0c660bb
--- /dev/null
+++ b/include/lib/extensions/amu_private.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef __AMU_PRIVATE_H__
+#define __AMU_PRIVATE_H__
+
+#include <stdint.h>
+
+uint64_t amu_group0_cnt_read_internal(int idx);
+void amu_group0_cnt_write_internal(int idx, uint64_t);
+
+uint64_t amu_group1_cnt_read_internal(int idx);
+void amu_group1_cnt_write_internal(int idx, uint64_t);
+void amu_group1_set_evtype_internal(int idx, unsigned int val);
+
+#endif /* __AMU_PRIVATE_H__ */