diff --git a/hw/mips_malta.c b/hw/mips_malta.c
index e732798..8d77b78 100644
--- a/hw/mips_malta.c
+++ b/hw/mips_malta.c
@@ -693,7 +693,7 @@
     if (serial_hds[0])
         serial_init(&pic_set_irq_new, isa_pic, 0x3f8, 4, serial_hds[0]);
     if (serial_hds[1])
-        serial_init(&pic_set_irq_new, isa_pic, 0x2f8, 4, serial_hds[1]);
+        serial_init(&pic_set_irq_new, isa_pic, 0x2f8, 3, serial_hds[1]);
     if (parallel_hds[0])
         parallel_init(0x378, 7, parallel_hds[0]);
     /* XXX: The floppy controller does not work correctly, something is