diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/queries/templates/ResourceRegistryQueryTemplateClient.java b/src/main/java/org/gcube/informationsystem/resourceregistry/queries/templates/ResourceRegistryQueryTemplateClient.java
index cfd6108..b4def08 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/queries/templates/ResourceRegistryQueryTemplateClient.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/queries/templates/ResourceRegistryQueryTemplateClient.java
@@ -14,6 +14,8 @@ import org.gcube.informationsystem.resourceregistry.api.exceptions.queries.templ
  */
 public interface ResourceRegistryQueryTemplateClient {
 
+	public void addHeader(String name, String value);
+	
 	public List<QueryTemplate> all() throws ResourceRegistryException;
 	
 	public QueryTemplate create(QueryTemplate queryTemplate) throws QueryTemplateAlreadyPresentException, ResourceRegistryException;
diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/queries/templates/ResourceRegistryQueryTemplateClientImpl.java b/src/main/java/org/gcube/informationsystem/resourceregistry/queries/templates/ResourceRegistryQueryTemplateClientImpl.java
index df5f6f1..7e0d010 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/queries/templates/ResourceRegistryQueryTemplateClientImpl.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/queries/templates/ResourceRegistryQueryTemplateClientImpl.java
@@ -38,6 +38,7 @@ public class ResourceRegistryQueryTemplateClientImpl implements ResourceRegistry
 	
 	protected Map<String, String> headers;
 	
+	@Override
 	public void addHeader(String name, String value) {
 		headers.put(name, value);
 	}