diff --git a/qemu/saimaa.c b/qemu/saimaa.c
index 32bca44..c27e2f9 100644
--- a/qemu/saimaa.c
+++ b/qemu/saimaa.c
@@ -227,6 +227,8 @@ static void saimaa_machine_init(MachineState *machine)
     MemoryRegion *sysmem = get_system_memory();
     int i;
 
+    setvbuf(stdout, NULL, _IONBF, 0); /* UART stub uses putchar; no lost logs */
+
     /* RAM map */
     const struct { const char *n; hwaddr b; hwaddr s; } rams[] = {
         { "saimaa.uefi", SAIMAA_UEFI_BASE, SAIMAA_UEFI_SIZE },