diff --git a/src/main/java/org/gcube/informationsystem/utils/TypeUtility.java b/src/main/java/org/gcube/informationsystem/utils/TypeUtility.java
index 8ad8f00..474c095 100644
--- a/src/main/java/org/gcube/informationsystem/utils/TypeUtility.java
+++ b/src/main/java/org/gcube/informationsystem/utils/TypeUtility.java
@@ -13,7 +13,10 @@ import org.gcube.informationsystem.types.TypeMapper;
 public class TypeUtility {
 	
 	public static String getTypeName(JsonNode jsonNode){
-		return jsonNode.get(Element.CLASS_PROPERTY).asText();
+		if(jsonNode.has(Element.CLASS_PROPERTY)) {
+			return jsonNode.get(Element.CLASS_PROPERTY).asText();
+		}
+		return null;
 	}
 	
 	public static String getTypeName(String json) throws JsonProcessingException, IOException{