Test adding to inherited collections

1 files changed, 2 insertions, 1 deletions

diff --git a/config-model/src/main/java/com/yahoo/documentmodel/NewDocumentType.java b/config-model/src/main/java/com/yahoo/documentmodel/NewDocumentType.java
index 301141d0465..08a0f8b9882 100644
--- a/config-model/src/main/java/com/yahoo/documentmodel/NewDocumentType.java
+++ b/config-model/src/main/java/com/yahoo/documentmodel/NewDocumentType.java
@@ -22,6 +22,7 @@ import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;
 import java.util.LinkedList;
 import java.util.Map;
+import java.util.Optional;
 import java.util.Set;
 
 import static java.util.Collections.emptySet;
@@ -53,7 +54,7 @@ public final class NewDocumentType extends StructuredDataType implements DataTyp
         this(
                 name,
                 new StructDataType(name.getName() + ".header"),
-                new FieldSets(),
+                new FieldSets(Optional.empty()),
                 documentReferences,
                 importedFieldNames);
     }