diff --git a/core/net/src/main/java/org/onlab/onos/net/proxyarp/impl/ProxyArpManager.java b/core/net/src/main/java/org/onlab/onos/net/proxyarp/impl/ProxyArpManager.java
index 5e7e012..4933322 100644
--- a/core/net/src/main/java/org/onlab/onos/net/proxyarp/impl/ProxyArpManager.java
+++ b/core/net/src/main/java/org/onlab/onos/net/proxyarp/impl/ProxyArpManager.java
@@ -206,12 +206,12 @@
             for (Link l : links) {
                 // for each link, mark the concerned ports as internal
                 // and the remaining ports are therefore external.
-                if (l.src().deviceId().equals(d)
+                if (l.src().deviceId().equals(d.id())
                         && ports.contains(l.src().port())) {
                     ports.remove(l.src().port());
                     internalPorts.put(d, l.src().port());
                 }
-                if (l.dst().deviceId().equals(d)
+                if (l.dst().deviceId().equals(d.id())
                         && ports.contains(l.dst().port())) {
                     ports.remove(l.dst().port());
                     internalPorts.put(d, l.dst().port());