diff --git a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20-ipc_conf.dtsi b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20-ipc_conf.dtsi
index a17889fe0b0..0b866a889f6 100644
--- a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20-ipc_conf.dtsi
+++ b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20-ipc_conf.dtsi
@@ -9,6 +9,7 @@
 		cpusec_cpuapp_ipc: ipc-1-2 {
 			compatible = "zephyr,ipc-icmsg";
 			status = "disabled";
+			dcache-alignment = <32>;
 			mboxes = <&cpusec_bellboard 12>,
 				 <&cpuapp_bellboard 0>;
 		};
@@ -16,6 +17,7 @@
 		cpusec_cpurad_ipc: ipc-1-3 {
 			compatible = "zephyr,ipc-icmsg";
 			status = "disabled";
+			dcache-alignment = <32>;
 			mboxes = <&cpusec_bellboard 18>,
 				 <&cpurad_bellboard 0>;
 		};
@@ -30,6 +32,7 @@
 		cpuapp_cpusys_ipc: ipc-2-12 {
 			compatible = "zephyr,ipc-icmsg";
 			status = "disabled";
+			dcache-alignment = <32>;
 			mboxes = <&cpuapp_bellboard 6>,
 				 <&cpusys_vevif 12>;
 		};
@@ -37,6 +40,7 @@
 		cpuapp_cpuppr_ipc: ipc-2-13 {
 			compatible = "zephyr,ipc-icmsg";
 			status = "disabled";
+			dcache-alignment = <32>;
 			mboxes = <&cpuapp_bellboard 13>,
 				 <&cpuppr_vevif 12>;
 		};
@@ -44,6 +48,7 @@
 		cpuapp_cpuflpr_ipc: ipc-2-14 {
 			compatible = "zephyr,ipc-icmsg";
 			status = "disabled";
+			dcache-alignment = <32>;
 			mboxes = <&cpuapp_bellboard 14>,
 				 <&cpuflpr_vevif 16>;
 		};
@@ -51,6 +56,7 @@
 		cpurad_cpusys_ipc: ipc-3-12 {
 			compatible = "zephyr,ipc-icmsg";
 			status = "disabled";
+			dcache-alignment = <32>;
 			mboxes = <&cpurad_bellboard 6>,
 				 <&cpusys_vevif 18>;
 		};
diff --git a/boards/nordic/nrf9280pdk/nrf9280pdk_nrf9280-ipc_conf.dtsi b/boards/nordic/nrf9280pdk/nrf9280pdk_nrf9280-ipc_conf.dtsi
index 944dd7fb6ab..f3a05ee5a05 100644
--- a/boards/nordic/nrf9280pdk/nrf9280pdk_nrf9280-ipc_conf.dtsi
+++ b/boards/nordic/nrf9280pdk/nrf9280pdk_nrf9280-ipc_conf.dtsi
@@ -9,6 +9,7 @@
 		cpusec_cpuapp_ipc: ipc-1-2 {
 			compatible = "zephyr,ipc-icmsg";
 			status = "disabled";
+			dcache-alignment = <32>;
 			mboxes = <&cpusec_bellboard 12>,
 				 <&cpuapp_bellboard 0>;
 		};
@@ -16,6 +17,7 @@
 		cpusec_cpurad_ipc: ipc-1-3 {
 			compatible = "zephyr,ipc-icmsg";
 			status = "disabled";
+			dcache-alignment = <32>;
 			mboxes = <&cpusec_bellboard 18>,
 				 <&cpurad_bellboard 0>;
 		};
@@ -30,6 +32,7 @@
 		cpuapp_cpusys_ipc: ipc-2-12 {
 			compatible = "zephyr,ipc-icmsg";
 			status = "disabled";
+			dcache-alignment = <32>;
 			mboxes = <&cpuapp_bellboard 6>,
 				 <&cpusys_vevif 12>;
 		};
@@ -37,6 +40,7 @@
 		cpuapp_cpuppr_ipc: ipc-2-13 {
 			compatible = "zephyr,ipc-icmsg";
 			status = "disabled";
+			dcache-alignment = <32>;
 			mboxes = <&cpuapp_bellboard 13>,
 				 <&cpuppr_vevif 12>;
 		};
@@ -44,6 +48,7 @@
 		cpurad_cpusys_ipc: ipc-3-12 {
 			compatible = "zephyr,ipc-icmsg";
 			status = "disabled";
+			dcache-alignment = <32>;
 			mboxes = <&cpurad_bellboard 6>,
 				 <&cpusys_vevif 18>;
 		};