diff --git a/include/plat/arm/board/common/rotpk/rotpk_def.h b/include/plat/arm/board/common/rotpk/rotpk_def.h
new file mode 100644
index 0000000..685c21a
--- /dev/null
+++ b/include/plat/arm/board/common/rotpk/rotpk_def.h
@@ -0,0 +1,24 @@
+
+/*
+ * Copyright (c) 2024, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef ROTPK_DEF_H
+#define ROTPK_DEF_H
+
+/*
+ * Definitions related to ROTPK
+ */
+
+/*
+ * Root of trust key lengths
+ */
+#ifndef ARM_ROTPK_HEADER_LEN
+#define ARM_ROTPK_HEADER_LEN		19
+#endif
+#ifndef ARM_ROTPK_HASH_LEN
+#define ARM_ROTPK_HASH_LEN		32
+#endif
+#endif /* ROTPK_DEF_H */