diff --git a/service/api/src/main/java/org/eclipse/kapua/model/xml/adapters/XmlPropertiesAdapter.java b/service/api/src/main/java/org/eclipse/kapua/model/xml/adapters/XmlPropertiesAdapter.java
index edd83842c37..87cebc3e434 100644
--- a/service/api/src/main/java/org/eclipse/kapua/model/xml/adapters/XmlPropertiesAdapter.java
+++ b/service/api/src/main/java/org/eclipse/kapua/model/xml/adapters/XmlPropertiesAdapter.java
@@ -42,7 +42,7 @@ public Map<String, Object> unmarshal(V[] properties) {
                 .orElse(Collections.emptyList())
                 .stream()
                 .peek(adaptedProp -> {
-                    if (adaptedProp.getType() == null) {
+                    if (adaptedProp.getType() == null && adaptedProp.getValues() != null) {
                         throw new InternalError("null value for property.type parameter");
                     }
                 })