diff --git a/src/main/java/org/gcube/informationsystem/utils/ISMapper.java b/src/main/java/org/gcube/informationsystem/utils/ISMapper.java
index 2c29f8d..93a9d59 100644
--- a/src/main/java/org/gcube/informationsystem/utils/ISMapper.java
+++ b/src/main/java/org/gcube/informationsystem/utils/ISMapper.java
@@ -215,9 +215,9 @@ public abstract class ISMapper {
 	 * @throws JsonMappingException
 	 * @throws IOException
 	 */
-	public static <ISM extends ISManageable> ISM unmarshalWithReader(Class<ISM> reader, String string)
+	public static <ISM extends ISManageable> ISM unmarshalWithReader(Class<ISM> clz, String string)
 			throws JsonParseException, JsonMappingException, IOException {
-		return mapper.readerFor(reader).readValue(string);
+		return mapper.readerFor(clz).readValue(string);
 	}
 	
 	public static <ISM extends ISManageable> List<ISM> unmarshalList(Class<ISM> clz, String string)