diff --git a/choam/src/main/java/com/salesforce/apollo/choam/CHOAM.java b/choam/src/main/java/com/salesforce/apollo/choam/CHOAM.java
index f0ef6409f..d73a06ffc 100644
--- a/choam/src/main/java/com/salesforce/apollo/choam/CHOAM.java
+++ b/choam/src/main/java/com/salesforce/apollo/choam/CHOAM.java
@@ -135,7 +135,7 @@ public CHOAM(Parameters params) {
         session = new Session(params, service());
     }
 
-    public static Checkpoint checkpoint(DigestAlgorithm algo, File state, int segmentSize, Digest initial) {
+    public static Checkpoint checkpoint(DigestAlgorithm algo, File state, int segmentSize, Digest initial, int crowns) {
         assert segmentSize > 0 : "segment size must be > 0 : " + segmentSize;
         long length = 0;
         if (state != null) {
@@ -145,7 +145,7 @@ public static Checkpoint checkpoint(DigestAlgorithm algo, File state, int segmen
         if (length != 0 && count * segmentSize < length) {
             count++;
         }
-        var accumulator = new HexBloom.HexAccumulator(count, 2, initial);
+        var accumulator = new HexBloom.HexAccumulator(count, crowns, initial);
         Checkpoint.Builder builder = Checkpoint.newBuilder()
                                                .setCount(count)
                                                .setByteSize(length)
@@ -386,7 +386,8 @@ private Block checkpoint() {
             return null;
         }
         final HashedBlock c = checkpoint.get();
-        Checkpoint cp = checkpoint(params.digestAlgorithm(), state, params.checkpointSegmentSize(), c.hash);
+        Checkpoint cp = checkpoint(params.digestAlgorithm(), state, params.checkpointSegmentSize(), c.hash,
+                                   params.crowns());
         if (cp == null) {
             transitions.fail();
             return null;
diff --git a/choam/src/test/java/com/salesforce/apollo/choam/TestChain.java b/choam/src/test/java/com/salesforce/apollo/choam/TestChain.java
index 3d93b02ad..d86c4773f 100644
--- a/choam/src/test/java/com/salesforce/apollo/choam/TestChain.java
+++ b/choam/src/test/java/com/salesforce/apollo/choam/TestChain.java
@@ -128,7 +128,7 @@ private HashedCertifiedBlock checkpointBlock() {
                                                                                                    CHOAM.checkpoint(
                                                                                                    DigestAlgorithm.DEFAULT,
                                                                                                    null, 1,
-                                                                                                   checkpoint.hash))
+                                                                                                   checkpoint.hash, 2))
                                                                                                    .build())
                                                                                     .build());
         store.put(lastBlock);
diff --git a/choam/src/test/java/com/salesforce/apollo/choam/support/CheckpointAssemblerTest.java b/choam/src/test/java/com/salesforce/apollo/choam/support/CheckpointAssemblerTest.java
index 315365e80..f451b8714 100644
--- a/choam/src/test/java/com/salesforce/apollo/choam/support/CheckpointAssemblerTest.java
+++ b/choam/src/test/java/com/salesforce/apollo/choam/support/CheckpointAssemblerTest.java
@@ -11,6 +11,7 @@
 import com.salesfoce.apollo.choam.proto.CheckpointSegments;
 import com.salesfoce.apollo.choam.proto.Slice;
 import com.salesforce.apollo.archipelago.RouterImpl.CommonCommunications;
+import com.salesforce.apollo.bloomFilters.BloomFilter;
 import com.salesforce.apollo.choam.CHOAM;
 import com.salesforce.apollo.choam.comm.Concierge;
 import com.salesforce.apollo.choam.comm.Terminal;
@@ -25,7 +26,6 @@
 import com.salesforce.apollo.stereotomy.mem.MemKERL;
 import com.salesforce.apollo.stereotomy.mem.MemKeyStore;
 import com.salesforce.apollo.utils.Utils;
-import com.salesforce.apollo.bloomFilters.BloomFilter;
 import org.h2.mvstore.MVStore;
 import org.joou.ULong;
 import org.junit.jupiter.api.AfterEach;
@@ -94,7 +94,8 @@ public void functional() throws Exception {
                                                .toList();
         members.forEach(m -> context.activate(m));
 
-        Checkpoint checkpoint = CHOAM.checkpoint(DigestAlgorithm.DEFAULT, chkptFile, SEGMENT_SIZE, DigestAlgorithm.DEFAULT.getOrigin());
+        Checkpoint checkpoint = CHOAM.checkpoint(DigestAlgorithm.DEFAULT, chkptFile, SEGMENT_SIZE,
+                                                 DigestAlgorithm.DEFAULT.getOrigin(), 2);
 
         SigningMember bootstrapping = members.get(0);