diff --git a/qemu-char.c b/qemu-char.c
index 11caa5648d..e133f4fc35 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -3972,6 +3972,7 @@ static void qemu_chr_free_common(CharDriverState *chr)
     if (chr->logfd != -1) {
         close(chr->logfd);
     }
+    qemu_mutex_destroy(&chr->chr_write_lock);
     g_free(chr);
 }