diff --git a/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Qemu_mps2/FreeRTOSConfig.h b/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Qemu_mps2/FreeRTOSConfig.h
index 5704118e95..e889705d42 100755
--- a/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Qemu_mps2/FreeRTOSConfig.h
+++ b/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Echo_Qemu_mps2/FreeRTOSConfig.h
@@ -81,7 +81,7 @@ to exclude the API function. */
 #define configKERNEL_INTERRUPT_PRIORITY         255
 /* !!!! configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to zero !!!!
 See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */
-#define configMAX_SYSCALL_INTERRUPT_PRIORITY    5 /* equivalent to 0xa0, or priority 5. */
+#define configMAX_SYSCALL_INTERRUPT_PRIORITY    4
 #define configMAC_INTERRUPT_PRIORITY            5