diff --git a/go/operation/allocate_volume.go b/go/operation/allocate_volume.go
index 71b08405a..3f96583e5 100644
--- a/go/operation/allocate_volume.go
+++ b/go/operation/allocate_volume.go
@@ -17,7 +17,7 @@ func AllocateVolume(dn *topology.DataNode, vid storage.VolumeId, collection stri
 	values := make(url.Values)
 	values.Add("volume", vid.String())
 	values.Add("collection", collection)
-	values.Add("replicationType", repType.String())
+	values.Add("replication", repType.String())
 	jsonBlob, err := util.Post("http://"+dn.PublicUrl+"/admin/assign_volume", values)
 	if err != nil {
 		return err