diff --git a/hw/char/debugcon.c b/hw/char/debugcon.c
index 7e41c904414b49e6878de43ecbb84f7df362cecb..52fa0ab10f1620e34798d6de876b934e7651653c 100644
--- a/hw/char/debugcon.c
+++ b/hw/char/debugcon.c
@@ -55,7 +55,7 @@ static void debugcon_ioport_write(void *opaque, hwaddr addr, uint64_t val,
     unsigned char ch = val;
 
 #ifdef DEBUG_DEBUGCON
-    printf("debugcon: write addr=0x%04" HWADDR_PRIx " val=0x%02x\n", addr, val);
+    printf(" [debugcon: write addr=0x%04" HWADDR_PRIx " val=0x%02x]\n", addr, val);
 #endif
 
     qemu_chr_fe_write(s->chr, &ch, 1);