diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/types/SchemaManagementImpl.java b/src/main/java/org/gcube/informationsystem/resourceregistry/types/SchemaManagementImpl.java
index c0d21c5..24d3a1f 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/types/SchemaManagementImpl.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/types/SchemaManagementImpl.java
@@ -38,7 +38,6 @@ import org.gcube.informationsystem.resourceregistry.types.relations.IsRelatedToT
 import org.gcube.informationsystem.types.OrientDBType;
 import org.gcube.informationsystem.types.TypeBinder;
 import org.gcube.informationsystem.types.reference.Type;
-import org.gcube.informationsystem.types.reference.TypeWithProperties;
 import org.gcube.informationsystem.types.reference.entities.EntityType;
 import org.gcube.informationsystem.types.reference.entities.FacetType;
 import org.gcube.informationsystem.types.reference.entities.ResourceType;
@@ -292,7 +291,7 @@ public class SchemaManagementImpl implements SchemaManagement {
 				if(!(type instanceof ResourceType)) {
 					// A Resource cannot contains any properties.
 					
-					Set<PropertyDefinition> propertyDefinitions = ((TypeWithProperties) type).getProperties();
+					Set<PropertyDefinition> propertyDefinitions = type.getProperties();
 					
 					if(propertyDefinitions!=null) {
 						for(PropertyDefinition propertyDefinition : propertyDefinitions) {