diff --git a/hw/mips/mips_jazz.c b/hw/mips/mips_jazz.c
index 85d49cf155..32fbd10b4e 100644
--- a/hw/mips/mips_jazz.c
+++ b/hw/mips/mips_jazz.c
@@ -164,6 +164,11 @@ static void mips_jazz_init(MachineState *machine,
     SysBusESPState *sysbus_esp;
     ESPState *esp;
 
+    if (machine->ram_size > 256 * MiB) {
+        error_report("RAM size more than 256Mb is not supported");
+        exit(EXIT_FAILURE);
+    }
+
     /* init CPUs */
     cpu = MIPS_CPU(cpu_create(machine->cpu_type));
     env = &cpu->env;