diff --git a/hw/arm/kzm.c b/hw/arm/kzm.c
index 1d5ef289d5..94cbac11de 100644
--- a/hw/arm/kzm.c
+++ b/hw/arm/kzm.c
@@ -25,6 +25,7 @@
 #include "hw/char/serial.h"
 #include "sysemu/qtest.h"
 #include "sysemu/sysemu.h"
+#include "qemu/cutils.h"
 
 /* Memory map for Kzm Emulation Baseboard:
  * 0x00000000-0x7fffffff See i.MX31 SOC for support
@@ -78,10 +79,10 @@ static void kzm_init(MachineState *machine)
 
     /* Check the amount of memory is compatible with the SOC */
     if (machine->ram_size > (FSL_IMX31_SDRAM0_SIZE + FSL_IMX31_SDRAM1_SIZE)) {
-        warn_report("RAM size " RAM_ADDR_FMT " above max supported, "
-                    "reduced to %x", machine->ram_size,
-                    FSL_IMX31_SDRAM0_SIZE + FSL_IMX31_SDRAM1_SIZE);
-        machine->ram_size = FSL_IMX31_SDRAM0_SIZE + FSL_IMX31_SDRAM1_SIZE;
+        char *sz = size_to_str(FSL_IMX31_SDRAM0_SIZE + FSL_IMX31_SDRAM1_SIZE);
+        error_report("RAM size more than %s is not supported", sz);
+        g_free(sz);
+        exit(EXIT_FAILURE);
     }
 
     memory_region_allocate_system_memory(&s->ram, NULL, "kzm.ram",