diff --git a/src/main/java/bdv/server/CellHandler.java b/src/main/java/bdv/server/CellHandler.java
index 927abd9f7ad034a58f5afc2b581bc558dd87ab3e..cecb8ce849f41b926f80b45d02a4bd1a1a889b88 100644
--- a/src/main/java/bdv/server/CellHandler.java
+++ b/src/main/java/bdv/server/CellHandler.java
@@ -430,6 +430,7 @@ public class CellHandler extends ContextHandler {
         }
 
         try (final DataOutputStream dos = new DataOutputStream(response.getOutputStream())) {
+            dos.writeByte(compressionParams.getCompressFromMipmapLevel());
             dos.writeByte(cachedCodebooks.size());
             for (final ICacheFile cacheFile : cachedCodebooks) {
                 cacheFile.writeToStream(dos);