fix for cbench
diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/DefaultTrafficTreatment.java b/core/api/src/main/java/org/onlab/onos/net/flow/DefaultTrafficTreatment.java
index 6eaa2c3..6064263 100644
--- a/core/api/src/main/java/org/onlab/onos/net/flow/DefaultTrafficTreatment.java
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/DefaultTrafficTreatment.java
@@ -6,6 +6,7 @@
 import java.util.LinkedList;
 import java.util.List;
 
+import org.onlab.onos.net.flow.instructions.Instruction;
 import org.slf4j.Logger;
 
 @SuppressWarnings("rawtypes")