diff --git a/src/main/java/org/gcube/informationsystem/discovery/Discovery.java b/src/main/java/org/gcube/informationsystem/discovery/Discovery.java
index 8c6c3c9..dd6f437 100644
--- a/src/main/java/org/gcube/informationsystem/discovery/Discovery.java
+++ b/src/main/java/org/gcube/informationsystem/discovery/Discovery.java
@@ -80,11 +80,12 @@ public class Discovery<E extends Element> {
 		}
 	}
 	
+	@SuppressWarnings("unchecked")
 	protected void add(Class<E> clz) throws Exception {
 		if(!discoveredElement.contains(clz)) {
 			discoveredElement.add(clz);
-			for(DiscoveredElementAction<E> discoveredElementAction : discoveredElementActions) {
-				discoveredElementAction.analizeElement(clz);
+			for(DiscoveredElementAction<Element> discoveredElementAction : discoveredElementActions) {
+				discoveredElementAction.analizeElement((Class<Element>) clz);
 			}
 			logger.info("+ Added {}.", clz);
 		}