diff --git a/hw/ipmi/ipmi_bmc_extern.c b/hw/ipmi/ipmi_bmc_extern.c
index 450926e5fb..adf2afe728 100644
--- a/hw/ipmi/ipmi_bmc_extern.c
+++ b/hw/ipmi/ipmi_bmc_extern.c
@@ -435,6 +435,12 @@ static void chr_event(void *opaque, int event)
             k->handle_rsp(s, ibe->outbuf[0], ibe->inbuf + 1, 3);
         }
         break;
+
+    case CHR_EVENT_BREAK:
+    case CHR_EVENT_MUX_IN:
+    case CHR_EVENT_MUX_OUT:
+        /* Ignore */
+        break;
     }
 }