diff --git a/hw/misc/auxbus.c b/hw/misc/auxbus.c
index f8e7b97971..06aabf20c5 100644
--- a/hw/misc/auxbus.c
+++ b/hw/misc/auxbus.c
@@ -196,7 +196,7 @@ AUXReply aux_request(AUXBus *bus, AUXCommand cmd, uint32_t address,
         }
         break;
     default:
-        DPRINTF("Not implemented!\n");
+        qemu_log_mask(LOG_UNIMP, "AUX cmd=%u not implemented\n", cmd);
         return AUX_NACK;
     }