diff --git a/hamt/hamt.go b/hamt/hamt.go
index 17aa01733..ccdffe7e4 100644
--- a/hamt/hamt.go
+++ b/hamt/hamt.go
@@ -125,6 +125,7 @@ func NewHamtFromDag(dserv dag.DAGService, nd node.Node) (*HamtShard, error) {
 	return ds, nil
 }
 
+// SetPrefix sets the CID Prefix
 func (ds *HamtShard) SetPrefix(prefix *cid.Prefix) {
 	ds.prefix = prefix
 }