diff --git a/rln/rln.go b/rln/rln.go
index 880431b..911512a 100644
--- a/rln/rln.go
+++ b/rln/rln.go
@@ -427,7 +427,7 @@ func (r *RLN) InsertMember(idComm IDCommitment, userMessageLimit uint32) error {
 	return nil
 }
 
-func (r *RLN) InsertRawLeaf(rawLeaf [32]byte) error {
+func (r *RLN) InsertRawLeaf(rawLeaf MerkleNode) error {
 	insertionSuccess := r.w.SetNextLeaf(rawLeaf[:])
 	if !insertionSuccess {
 		return errors.New("could not insert raw leaf")