diff --git a/test_data/of10/flow_add.data b/test_data/of10/flow_add.data
index 127e1fc..60fd780 100644
--- a/test_data/of10/flow_add.data
+++ b/test_data/of10/flow_add.data
@@ -148,6 +148,7 @@
     .setIdleTimeout(5)
     .setFlags(Sets.immutableEnumSet(OFFlowModFlags.CHECK_OVERLAP))
     .setBufferId(OFBufferId.of(0))
+    .setOutPort(OFPort.of(0)) // doesn't make that much sense, but is in the example
     .setActions(
         ImmutableList.of(
             factory.actions().output(OFPort.FLOOD, 0),