diff --git a/source/java/org/alfresco/filesys/alfresco/AlfrescoNetworkFile.java b/source/java/org/alfresco/filesys/alfresco/AlfrescoNetworkFile.java
index 46475f8294..d943d0cda4 100644
--- a/source/java/org/alfresco/filesys/alfresco/AlfrescoNetworkFile.java
+++ b/source/java/org/alfresco/filesys/alfresco/AlfrescoNetworkFile.java
@@ -63,4 +63,12 @@ public abstract class AlfrescoNetworkFile extends NetworkFile implements Network
   {
     m_state = state;
   }
+  
+  /**
+   * Tell JLAN it needs to call disk.closeFile rather than short cutting.
+   * @return
+   */
+  public boolean allowsOpenCloseViaNetworkFile() {
+      return false;
+  }
 }
diff --git a/source/java/org/alfresco/filesys/repo/TempNetworkFile.java b/source/java/org/alfresco/filesys/repo/TempNetworkFile.java
index abde1c0614..33af1b3bac 100644
--- a/source/java/org/alfresco/filesys/repo/TempNetworkFile.java
+++ b/source/java/org/alfresco/filesys/repo/TempNetworkFile.java
@@ -124,6 +124,14 @@ public class TempNetworkFile extends JavaNetworkFile implements NetworkFileState
         return fileState;
     }
     
+    /**
+     * Tell JLAN it needs to call disk.closeFile rather than short cutting.
+     * @return
+     */
+    public boolean allowsOpenCloseViaNetworkFile() {
+        return false;
+    }
+    
     
     private FileState fileState;
 }