diff --git a/chardev/char.c b/chardev/char.c
index 7b6b2cb123..739da1155b 100644
--- a/chardev/char.c
+++ b/chardev/char.c
@@ -69,6 +69,11 @@ void qemu_chr_be_event(Chardev *s, int event)
         case CHR_EVENT_CLOSED:
             s->be_open = 0;
             break;
+    case CHR_EVENT_BREAK:
+    case CHR_EVENT_MUX_IN:
+    case CHR_EVENT_MUX_OUT:
+        /* Ignore */
+        break;
     }
 
     CHARDEV_GET_CLASS(s)->chr_be_event(s, event);