diff --git a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20-ipc_conf.dtsi b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20-ipc_conf.dtsi
index abe93b34ba9..944dd7fb6ab 100644
--- a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20-ipc_conf.dtsi
+++ b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20-ipc_conf.dtsi
@@ -21,6 +21,7 @@
 		};
 
 		cpuapp_cpurad_ipc: ipc-2-3 {
+			compatible = "zephyr,ipc-icbmsg";
 			status = "disabled";
 			mboxes = <&cpuapp_bellboard 18>,
 				 <&cpurad_bellboard 12>;
diff --git a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp.dts b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp.dts
index 60e872141ba..59e10976561 100644
--- a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp.dts
+++ b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp.dts
@@ -112,10 +112,11 @@
 };
 
 &cpuapp_cpurad_ipc {
-	compatible = "zephyr,ipc-icmsg-me-initiator";
 	mbox-names = "rx", "tx";
 	tx-region = <&cpuapp_cpurad_ipc_shm>;
 	rx-region = <&cpurad_cpuapp_ipc_shm>;
+	tx-blocks = <32>;
+	rx-blocks = <32>;
 };
 
 &cpuapp_cpusys_ipc {
diff --git a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpurad.dts b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpurad.dts
index 4cfeb3dbe9b..1507a78b0a1 100644
--- a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpurad.dts
+++ b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpurad.dts
@@ -46,10 +46,11 @@
 };
 
 &cpuapp_cpurad_ipc {
-	compatible = "zephyr,ipc-icmsg-me-follower";
 	mbox-names = "tx", "rx";
 	tx-region = <&cpurad_cpuapp_ipc_shm>;
 	rx-region = <&cpuapp_cpurad_ipc_shm>;
+	tx-blocks = <32>;
+	rx-blocks = <32>;
 };
 
 &cpurad_cpusys_ipc {