diff --git a/core/store/dist/src/test/java/org/onosproject/store/ecmap/EventuallyConsistentMapImplTest.java b/core/store/dist/src/test/java/org/onosproject/store/ecmap/EventuallyConsistentMapImplTest.java
index c215f5b..1b41d0c 100644
--- a/core/store/dist/src/test/java/org/onosproject/store/ecmap/EventuallyConsistentMapImplTest.java
+++ b/core/store/dist/src/test/java/org/onosproject/store/ecmap/EventuallyConsistentMapImplTest.java
@@ -785,6 +785,12 @@
         }
 
         @Override
+        public <M, R> void addSubscriber(MessageSubject subject,
+                Function<byte[], M> decoder, Function<M, CompletableFuture<R>> handler,
+                Function<R, byte[]> encoder) {
+        }
+
+        @Override
         public <M> void addSubscriber(MessageSubject subject,
                 Function<byte[], M> decoder, Consumer<M> handler,
                 Executor executor) {