diff --git a/src/mute-console/mute-console.c b/src/mute-console/mute-console.c
index 7ea1fcf17b..0a5ef85ec2 100644
--- a/src/mute-console/mute-console.c
+++ b/src/mute-console/mute-console.c
@@ -236,6 +236,10 @@ static int vl_method_mute(
         assert(link);
         assert(FLAGS_SET(flags, SD_VARLINK_METHOD_MORE));
 
+        /* Refuse multiple requests per connection. */
+        if (sd_varlink_get_userdata(link))
+                return -EBUSY;
+
         _cleanup_free_ Context *nc = new(Context, 1);
         if (!nc)
                 return -ENOMEM;