diff --git a/core/api/src/main/java/org/onlab/onos/net/flow/TrafficSelector.java b/core/api/src/main/java/org/onlab/onos/net/flow/TrafficSelector.java
index 49815db..ab9b4a1 100644
--- a/core/api/src/main/java/org/onlab/onos/net/flow/TrafficSelector.java
+++ b/core/api/src/main/java/org/onlab/onos/net/flow/TrafficSelector.java
@@ -134,7 +134,14 @@
          * @param lambda
          * @return a selection builder
          */
-        public Builder matchLambda(short lambda);
+        public Builder matchLambda(Short lambda);
+
+        /**
+         * Matches an optical Signal Type.
+         * @param signalType
+         * @return a selection builder
+         */
+        public Builder matchOpticalSignalType(Byte signalType);
 
         /**
          * Builds an immutable traffic selector.