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diff --git a/src/main/java/net/onrc/onos/ofcontroller/core/INetMapTopologyObjects.java b/src/main/java/net/onrc/onos/ofcontroller/core/INetMapTopologyObjects.java
index fc1c32f..d08da7c 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/core/INetMapTopologyObjects.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/core/INetMapTopologyObjects.java
@@ -73,6 +73,14 @@
 		@Property("number")
 		public Short getNumber();
 		
+		@JsonIgnore
+		@Property("port_id")
+		public void setPortId(String id);
+		
+		@JsonIgnore
+		@Property("port_id")
+		public String getPortId();
+		
 		@Property("number")
 		public void setNumber(Short n);