diff --git a/contribs/freight/src/main/java/org/matsim/freight/carriers/CarrierShipment.java b/contribs/freight/src/main/java/org/matsim/freight/carriers/CarrierShipment.java
index 93e9dc590fe..3955d7b1756 100644
--- a/contribs/freight/src/main/java/org/matsim/freight/carriers/CarrierShipment.java
+++ b/contribs/freight/src/main/java/org/matsim/freight/carriers/CarrierShipment.java
@@ -102,7 +102,7 @@ public Builder(Id<Link> pickupLinkId, Id<Link> deliveryLinkId, int demand) {
 			this.demand = demand;
 		}
 
-		public Builder(Id<CarrierShipment> id, Id<Link> pickupLinkId, Id<Link> deliveryLinkId, int demand) {
+		private Builder(Id<CarrierShipment> id, Id<Link> pickupLinkId, Id<Link> deliveryLinkId, int demand) {
 			super();
 			this.id = id;
 			this.pickupLinkId = pickupLinkId;