diff --git a/sources/AVISO.h b/sources/AVISO.h
index ec2f85a..611e45b 100644
--- a/sources/AVISO.h
+++ b/sources/AVISO.h
@@ -1,7 +1,7 @@
 #pragma once
-#include "layereddata.h"
+#include "layereddataz.h"
 
-class AVISOData: public LayeredData
+class AVISOData: public LayeredDataZ
 {
  enum Type
  {
@@ -49,6 +49,6 @@ class AVISOData: public LayeredData
    return "Unknown dataset: " + dataset;
 
   SetTitle(DataTitle());
-  return LayeredData::Open(dataset);
+  return LayeredDataZ::Open(dataset);
  }
 };
diff --git a/sources/NEMOBIO.h b/sources/NEMOBIO.h
index 2b7ac85..cb6daa8 100644
--- a/sources/NEMOBIO.h
+++ b/sources/NEMOBIO.h
@@ -1,7 +1,7 @@
 #pragma once
-#include "layereddata.h"
+#include "layereddataz.h"
 
-class NEMOBIOData: public LayeredData
+class NEMOBIOData: public LayeredDataZ
 {
  enum Type
  {
@@ -43,6 +43,6 @@ class NEMOBIOData: public LayeredData
    return "Unknown dataset: " + dataset;
 
   SetTitle(DataTitle());
-  return LayeredData::Open(dataset);
+  return LayeredDataZ::Open(dataset);
  }
 };