diff --git a/core/api/src/main/java/org/onosproject/net/flow/instructions/Instructions.java b/core/api/src/main/java/org/onosproject/net/flow/instructions/Instructions.java
index c9f1068..26981e5 100644
--- a/core/api/src/main/java/org/onosproject/net/flow/instructions/Instructions.java
+++ b/core/api/src/main/java/org/onosproject/net/flow/instructions/Instructions.java
@@ -25,10 +25,12 @@
 import org.onosproject.net.IndexedLambda;
 import org.onosproject.net.Lambda;
 import org.onosproject.net.OchSignal;
+import org.onosproject.net.OduSignalId;
 import org.onosproject.net.PortNumber;
 import org.onosproject.net.flow.instructions.L0ModificationInstruction.L0SubType;
 import org.onosproject.net.flow.instructions.L0ModificationInstruction.ModLambdaInstruction;
 import org.onosproject.net.flow.instructions.L0ModificationInstruction.ModOchSignalInstruction;
+import org.onosproject.net.flow.instructions.L1ModificationInstruction.ModOduSignalIdInstruction;
 import org.onosproject.net.flow.instructions.L3ModificationInstruction.L3SubType;
 import org.onosproject.net.flow.instructions.L3ModificationInstruction.ModIPInstruction;
 import org.onosproject.net.flow.instructions.L3ModificationInstruction.ModIPv6FlowLabelInstruction;
@@ -47,7 +49,6 @@
  */
 public final class Instructions {
 
-
     // Ban construction
     private Instructions() {}
 
@@ -117,6 +118,16 @@
     }
 
     /**
+     * Creates an L1 modification with the specified ODU signal Id.
+     *
+     * @param oduSignalId ODU Signal Id
+     * @return a L1 modification
+     */
+    public static L1ModificationInstruction modL1OduSignalId(OduSignalId oduSignalId) {
+        checkNotNull(oduSignalId, "L1 ODU signal ID cannot be null");
+        return new ModOduSignalIdInstruction(oduSignalId);
+    }
+    /**
      * Creates a l2 src modification.
      *
      * @param addr the mac address to modify to