diff --git a/src/main/java/org/biscuitsec/biscuit/token/Biscuit.java b/src/main/java/org/biscuitsec/biscuit/token/Biscuit.java
index f68b3ebf..efb03f92 100644
--- a/src/main/java/org/biscuitsec/biscuit/token/Biscuit.java
+++ b/src/main/java/org/biscuitsec/biscuit/token/Biscuit.java
@@ -95,6 +95,10 @@ static Biscuit make(final SecureRandom rng, final KeyPair root, final Option<Int
 
         KeyPair next = new KeyPair(rng);
 
+        for(PublicKey pk:  authority.publicKeys) {
+            authority.symbols.insert(pk);
+        }
+
         Either<Error.FormatError, SerializedBiscuit> container = SerializedBiscuit.make(root, root_key_id, authority, next);
         if (container.isLeft()) {
             throw container.getLeft();
@@ -342,6 +346,10 @@ public Biscuit attenuate(final SecureRandom rng, final KeyPair keypair, Block bl
             symbols.add(s);
         }
 
+        for(PublicKey pk: block.publicKeys) {
+            symbols.insert(pk);
+        }
+
         ArrayList<Block> blocks = new ArrayList<>();
         for (Block b : copiedBiscuit.blocks) {
             blocks.add(b);