diff --git a/qemu-char.c b/qemu-char.c
index ef73afe..ce2799e 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -2416,6 +2416,10 @@
     CharDriverState *chr;
     QemuOpts *opts;
 
+    if (strstart(filename, "chardev:", &p)) {
+        return qemu_chr_find(p);
+    }
+
     opts = qemu_chr_parse_compat(label, filename);
     if (!opts)
         return NULL;
@@ -2445,3 +2449,15 @@
         monitor_printf(mon, "%s: filename=%s\n", chr->label, chr->filename);
     }
 }
+
+CharDriverState *qemu_chr_find(const char *name)
+{
+    CharDriverState *chr;
+
+    TAILQ_FOREACH(chr, &chardevs, next) {
+        if (strcmp(chr->label, name) != 0)
+            continue;
+        return chr;
+    }
+    return NULL;
+}
diff --git a/qemu-char.h b/qemu-char.h
index 9bff0c7..0bf8944 100644
--- a/qemu-char.h
+++ b/qemu-char.h
@@ -90,6 +90,7 @@
 int qemu_chr_get_msgfd(CharDriverState *s);
 void qemu_chr_accept_input(CharDriverState *s);
 void qemu_chr_info(Monitor *mon);
+CharDriverState *qemu_chr_find(const char *name);
 
 extern int term_escape_char;
 
diff --git a/qemu-config.c b/qemu-config.c
index 8404f1b..f6f4cb4 100644
--- a/qemu-config.c
+++ b/qemu-config.c
@@ -130,6 +130,9 @@
         },{
             .name = "rows",
             .type = QEMU_OPT_NUMBER,
+        },{
+            .name = "mux",
+            .type = QEMU_OPT_BOOL,
         },
         { /* end if list */ }
     },