diff --git a/core/api/src/main/java/org/onosproject/net/newresource/ResourceId.java b/core/api/src/main/java/org/onosproject/net/newresource/ResourceId.java
index f32579f..c18e08b 100644
--- a/core/api/src/main/java/org/onosproject/net/newresource/ResourceId.java
+++ b/core/api/src/main/java/org/onosproject/net/newresource/ResourceId.java
@@ -70,7 +70,7 @@
 
     ResourceId child(Object child) {
         return new ResourceId(ImmutableList.builder()
-                .add(components)
+                .addAll(components)
                 .add(child)
                 .build());
     }