diff --git a/qemu-char.c b/qemu-char.c
index 22a9777f49..55e372cf32 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -581,6 +581,12 @@ static Notifier muxes_realize_notify = {
     .notify = muxes_realize_done,
 };
 
+static GSource *mux_chr_add_watch(CharDriverState *s, GIOCondition cond)
+{
+    MuxDriver *d = s->opaque;
+    return d->drv->chr_add_watch(d->drv, cond);
+}
+
 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
 {
     CharDriverState *chr;
@@ -597,6 +603,9 @@ static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
     chr->chr_accept_input = mux_chr_accept_input;
     /* Frontend guest-open / -close notification is not support with muxes */
     chr->chr_set_fe_open = NULL;
+    if (drv->chr_add_watch) {
+        chr->chr_add_watch = mux_chr_add_watch;
+    }
     /* only default to opened state if we've realized the initial
      * set of muxes
      */