diff --git a/core/api/src/main/java/org/onosproject/net/DefaultAnnotations.java b/core/api/src/main/java/org/onosproject/net/DefaultAnnotations.java
index 3911d0e..4215d65 100644
--- a/core/api/src/main/java/org/onosproject/net/DefaultAnnotations.java
+++ b/core/api/src/main/java/org/onosproject/net/DefaultAnnotations.java
@@ -29,7 +29,7 @@
  */
 public final class DefaultAnnotations implements SparseAnnotations {
 
-    public static final Annotations EMPTY = DefaultAnnotations.builder().build();
+    public static final SparseAnnotations EMPTY = DefaultAnnotations.builder().build();
 
     private final Map<String, String> map;
 
diff --git a/web/api/src/main/java/org/onosproject/rest/resources/ConfigProvider.java b/web/api/src/main/java/org/onosproject/rest/resources/ConfigProvider.java
index bfc1de7..55a14f3 100644
--- a/web/api/src/main/java/org/onosproject/rest/resources/ConfigProvider.java
+++ b/web/api/src/main/java/org/onosproject/rest/resources/ConfigProvider.java
@@ -465,7 +465,7 @@
     // Produces set of annotations from the given JSON node.
     private SparseAnnotations annotations(JsonNode node) {
         if (node == null) {
-            return (SparseAnnotations) DefaultAnnotations.EMPTY;
+            return DefaultAnnotations.EMPTY;
         }
 
         DefaultAnnotations.Builder builder = DefaultAnnotations.builder();