diff --git a/dagger/chunker.nim b/dagger/chunker.nim
index 65c8fbb4..6431161e 100644
--- a/dagger/chunker.nim
+++ b/dagger/chunker.nim
@@ -34,7 +34,7 @@ type
     FixedChunker
     RabinChunker
 
-  Chunker* = ref object
+  Chunker* = object
     reader*: Reader
     case kind*: ChunkerType:
     of FixedChunker: