diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClient.java b/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClient.java
index 52d62e7..ea39ad9 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClient.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClient.java
@@ -13,6 +13,8 @@ import org.gcube.informationsystem.types.reference.Type;
  */
 public interface ResourceRegistrySchemaClient {
 
+	public void addHeader(String name, String value);
+	
 	public String create(String typeDefinitition) throws SchemaException, ResourceRegistryException;
 	
 	public <E extends Element> Type create(Class<E> clz) throws SchemaException, ResourceRegistryException;
diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClientImpl.java b/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClientImpl.java
index bd70e5c..e5d8c9f 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClientImpl.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/schema/ResourceRegistrySchemaClientImpl.java
@@ -37,6 +37,7 @@ public class ResourceRegistrySchemaClientImpl implements ResourceRegistrySchemaC
 	
 	protected Map<String, String> headers;
 	
+	@Override
 	public void addHeader(String name, String value) {
 		headers.put(name, value);
 	}