Index: src/main/java/org/apache/jackrabbit/oak/plugins/index/lucene/ReadWriteOakDirectory.java
===================================================================
--- src/main/java/org/apache/jackrabbit/oak/plugins/index/lucene/ReadWriteOakDirectory.java	(revision 1414176)
+++ src/main/java/org/apache/jackrabbit/oak/plugins/index/lucene/ReadWriteOakDirectory.java	(working copy)
@@ -18,14 +18,11 @@
 
 import java.io.IOException;
 
-import org.apache.jackrabbit.oak.api.Type;
 import org.apache.jackrabbit.oak.spi.state.NodeBuilder;
 import org.apache.lucene.store.Directory;
 import org.apache.lucene.store.IOContext;
 import org.apache.lucene.store.IndexOutput;
 
-import static org.apache.jackrabbit.JcrConstants.*;
-
 /**
  * A red-write implementation of the Lucene {@link Directory} (a flat list of
  * files) that allows to store Lucene index content in an Oak repository.
@@ -34,7 +31,6 @@
 
     public ReadWriteOakDirectory(NodeBuilder directoryBuilder) {
         super(directoryBuilder);
-        this.directoryBuilder.setProperty(JCR_PRIMARYTYPE, NT_UNSTRUCTURED, Type.NAME);
     }
 
     @Override
@@ -58,8 +54,6 @@
             this.buffer = readFile(name);
             this.size = buffer.length;
             this.position = 0;
-            directoryBuilder.child(name).setProperty(JCR_PRIMARYTYPE,
-                    NT_UNSTRUCTURED, Type.NAME);
         }
 
         @Override