diff --git a/deployments/crypto/opteesp/default_crypto.dts.in b/deployments/crypto/opteesp/default_crypto.dts.in
index 92b709b..2646239 100644
--- a/deployments/crypto/opteesp/default_crypto.dts.in
+++ b/deployments/crypto/opteesp/default_crypto.dts.in
@@ -16,4 +16,15 @@
 	execution-state = <0>; /* AArch64 */
 	xlat-granule = <0>; /* 4KiB */
 	messaging-method = <0>; /* Direct messaging only */
+
+	device-regions {
+		compatible = "arm,ffa-manifest-device-regions";
+
+		trng {
+			/* Armv8 A Foundation Platform values */
+			base-address = <0x00000000 0x7fe60000>;
+			pages-count = <1>;
+			attributes = <0x3>; /* read-write */
+		};
+	};
 };