diff --git a/arch/arm/dts/k3-am62p5-r5-sk.dts b/arch/arm/dts/k3-am62p5-r5-sk.dts
index 357cd450ec..d221f734a4 100644
--- a/arch/arm/dts/k3-am62p5-r5-sk.dts
+++ b/arch/arm/dts/k3-am62p5-r5-sk.dts
@@ -41,8 +41,8 @@
 		ti,host-id = <36>;
 		ti,secure-host;
 		mbox-names = "rx", "tx";
-		mboxes= <&secure_proxy_main 22>,
-			<&secure_proxy_main 23>;
+		mboxes= <&secure_proxy_main 20>,
+			<&secure_proxy_main 21>;
 		bootph-all;
 	};
 };