diff --git a/src/device/kbc_at.c b/src/device/kbc_at.c
index 74ade4cd3..dd18649de 100644
--- a/src/device/kbc_at.c
+++ b/src/device/kbc_at.c
@@ -406,7 +406,9 @@ kbc_send_to_ob(atkbc_t *dev, uint8_t val, uint8_t channel, uint8_t stat_hi)
     } else if (dev->mem[0x20] & 0x01)
         picintlevel(1 << 1, &dev->irq_state); /* AT KBC: IRQ 1 is level-triggered because it is tied to OBF. */
 
-    if (dev->is_asic || (kbc_ven == KBC_VEN_IBM_PS1) || (kbc_ven == KBC_VEN_IBM))
+#ifdef WRONG_CONDITION
+    if ((dev->channel > 0) || dev->is_asic || (kbc_ven == KBC_VEN_IBM_PS1) || (kbc_ven == KBC_VEN_IBM))
+#endif
         kbc_do_irq(dev);
 
     dev->ob = temp;