diff --git a/applications/message_handler_openamp/main.cpp b/applications/message_handler_openamp/main.cpp
index e281f6e..7b755b9 100644
--- a/applications/message_handler_openamp/main.cpp
+++ b/applications/message_handler_openamp/main.cpp
@@ -1,6 +1,5 @@
 /*
  * SPDX-FileCopyrightText: Copyright 2022-2023 Arm Limited and/or its affiliates <open-source-office@arm.com>
- *
  * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the License); you may
@@ -152,6 +151,7 @@
     LOG_DEBUG("");
     mailbox.handleMessage();
 }
+#define MHU_IRQ_PRIORITY 5
 #endif
 
 } // namespace
@@ -185,8 +185,9 @@
 
 #ifdef MHU_IRQ
     // Register mailbox interrupt handler
-    NVIC_SetVector((IRQn_Type)MHU_IRQ, (uint32_t)&mailboxIrqHandler);
-    NVIC_EnableIRQ((IRQn_Type)MHU_IRQ);
+    NVIC_SetVector(static_cast<IRQn_Type>(MHU_IRQ), (uint32_t)&mailboxIrqHandler);
+    NVIC_SetPriority(static_cast<IRQn_Type>(MHU_IRQ), MHU_IRQ_PRIORITY);
+    NVIC_EnableIRQ(static_cast<IRQn_Type>(MHU_IRQ));
 #endif
 
     // Start Scheduler