diff --git a/src/main/java/org/gcube/informationsystem/types/impl/TypeDefinitionImpl.java b/src/main/java/org/gcube/informationsystem/types/impl/TypeDefinitionImpl.java
index d6be112..d0fd9ff 100644
--- a/src/main/java/org/gcube/informationsystem/types/impl/TypeDefinitionImpl.java
+++ b/src/main/java/org/gcube/informationsystem/types/impl/TypeDefinitionImpl.java
@@ -28,7 +28,7 @@ import com.fasterxml.jackson.annotation.JsonTypeName;
 
 // @JsonAutoDetect(fieldVisibility=JsonAutoDetect.Visibility.ANY)
 @JsonTypeName(value=TypeDefinition.NAME)
-public abstract class TypeDefinitionImpl<ISM extends ISManageable> extends ISManageableImpl implements TypeDefinition<ISM> {
+public class TypeDefinitionImpl<ISM extends ISManageable> extends ISManageableImpl implements TypeDefinition<ISM> {
 
 	/**
 	 * Generated Serial Version UID
@@ -106,7 +106,7 @@ public abstract class TypeDefinitionImpl<ISM extends ISManageable> extends ISMan
 		} else if(BaseProperty.class.isAssignableFrom(clz)){
 			return new PropertyTypeDefinitionImpl(clz);
 		} else if(TypeDefinition.class.isAssignableFrom(clz)) {
-			return new DummyTypeDefinitionImpl(clz);
+			return new TypeDefinitionImpl(clz);
 		} else {
 			throw new RuntimeException("Serialization required");
 		}