diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/types/OrientDBTypeMapping.java b/src/main/java/org/gcube/informationsystem/resourceregistry/types/OrientDBTypeMapping.java
index 5999542..b8ba749 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/types/OrientDBTypeMapping.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/types/OrientDBTypeMapping.java
@@ -24,6 +24,7 @@ public class OrientDBTypeMapping {
 	static {
 		BASE_TYPE_TO_OTYPE = new HashMap<>();
 		
+		BASE_TYPE_TO_OTYPE.put(BaseType.ANY, OType.ANY);
 		BASE_TYPE_TO_OTYPE.put(BaseType.BOOLEAN, OType.BOOLEAN);
 		BASE_TYPE_TO_OTYPE.put(BaseType.INTEGER, OType.INTEGER);
 		BASE_TYPE_TO_OTYPE.put(BaseType.SHORT, OType.SHORT);