diff --git a/lib/messages.js b/lib/messages.js
index fe1ff85..7afc9b0 100644
--- a/lib/messages.js
+++ b/lib/messages.js
@@ -941,5 +941,6 @@ Buffers.prototype.skip = function(i) {
 
 [Inventory, GetData, NotFound].forEach(function(clazz) {
   clazz.forBlock = creatorForItem(clazz, Inventory.TYPE.BLOCK);
+  clazz.forFilteredBlock = creatorForItem(clazz, Inventory.TYPE.FILTERED_BLOCK);
   clazz.forTransaction = creatorForItem(clazz, Inventory.TYPE.TX);
 });