diff --git a/include/tools_share/cca_oid.h b/include/tools_share/cca_oid.h
index 2ca12c9..d964aa7 100644
--- a/include/tools_share/cca_oid.h
+++ b/include/tools_share/cca_oid.h
@@ -9,6 +9,7 @@
 
 /* Reuse the Object IDs defined by TBBR for certificate extensions. */
 #include "tbbr_oid.h"
+#include "zero_oid.h"
 
 /*
  * Assign arbitrary Object ID values that do not conflict with any of the
diff --git a/include/tools_share/dualroot_oid.h b/include/tools_share/dualroot_oid.h
index 3e88a6d..76fffba 100644
--- a/include/tools_share/dualroot_oid.h
+++ b/include/tools_share/dualroot_oid.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, Arm Limited. All rights reserved.
+ * Copyright (c) 2020-2023, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -9,6 +9,7 @@
 
 /* Reuse the Object IDs defined by TBBR for certificate extensions. */
 #include "tbbr_oid.h"
+#include "zero_oid.h"
 
 /*
  * Platform root-of-trust public key.
diff --git a/include/tools_share/zero_oid.h b/include/tools_share/zero_oid.h
new file mode 100644
index 0000000..9b83094
--- /dev/null
+++ b/include/tools_share/zero_oid.h
@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) 2023, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef ZERO_OID_H
+#define ZERO_OID_H
+
+#define ZERO_OID                              "0.0.0.0.0.0.0.0.0"
+
+#endif /* ZERO_OID_H */