diff --git a/core/api/src/main/java/org/onosproject/ui/model/topo/UiTopoLayoutId.java b/core/api/src/main/java/org/onosproject/ui/model/topo/UiTopoLayoutId.java
index 2fa8717..289cacd 100644
--- a/core/api/src/main/java/org/onosproject/ui/model/topo/UiTopoLayoutId.java
+++ b/core/api/src/main/java/org/onosproject/ui/model/topo/UiTopoLayoutId.java
@@ -23,6 +23,11 @@
  */
 public final class UiTopoLayoutId extends Identifier<String> {
 
+    /**
+     * Default topology layout identifier.
+     */
+    public static final UiTopoLayoutId DEFAULT_ID = UiTopoLayoutId.layoutId("_default_");
+
     // For serialization
     private UiTopoLayoutId() {
     }