diff --git a/index.js b/index.js
index a3bba6c..75e86b0 100644
--- a/index.js
+++ b/index.js
@@ -215,7 +215,7 @@ exports.init = function (sbot, config) {
   function block(origFeedId, destFeedId, blocking, formatName) {
     initialized.promise.then(() => {
       const ebt = findEBTForFeed(origFeedId, formatName)
-      ebt.prepareForIsFeed(() => {
+      ebt.prepareForIsFeed(destFeedId, () => {
         if (!ebt.isFeed(origFeedId)) return
         if (!ebt.isFeed(destFeedId)) return
 
diff --git a/package.json b/package.json
index 1639cc2..1a29fe2 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "ssb-generate": "^1.0.1",
     "ssb-index-feed-writer": "^0.6.0",
     "ssb-keys": "^8.1.0",
-    "ssb-meta-feeds": "^0.21.0",
+    "ssb-meta-feeds": "^0.22.0",
     "ssb-validate": "^4.1.4",
     "tap-spec": "^5.0.0",
     "tape": "^5.2.2"