diff --git a/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/BoxController.h b/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/BoxController.h
index 364ed6e901f0dd2eb08d3d074d9be41d89ddd8f4..e08baf02c3f181389c2dc5ba04afb6b1b5d04ef5 100644
--- a/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/BoxController.h
+++ b/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/BoxController.h
@@ -16,7 +16,7 @@ namespace MDEvents
    * @author Janik Zikovsky
    * @date Feb 21, 2011
    */
-  class BoxController
+  class DLLExport BoxController
   {
   public:
 
diff --git a/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/Dimension.h b/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/Dimension.h
index 0428431c8db9435f9db42eb70dbc06732051a2d9..07802ca1ad29e04b7256ab1783ef96eae9ac5228 100644
--- a/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/Dimension.h
+++ b/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/Dimension.h
@@ -16,7 +16,7 @@ namespace MDEvents
    * @author
    * @date 2011-02-25 13:55:55.698592
    */
-  class Dimension
+  class DLLExport Dimension
   {
   public:
     Dimension();
diff --git a/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/IMDEventWorkspace.h b/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/IMDEventWorkspace.h
index 92011ab716f2b87bc0b335806d7c3b67a12cf138..e893196276529474241f70a4e984799476054588 100644
--- a/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/IMDEventWorkspace.h
+++ b/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/IMDEventWorkspace.h
@@ -21,7 +21,7 @@ namespace MDEvents
    * @date Dec 3, 2010
    *
    * */
-  DLLExport class IMDEventWorkspace  : public API::Workspace
+  class DLLExport IMDEventWorkspace  : public API::Workspace
   {
   public:
 
diff --git a/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/MDDimensionExtents.h b/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/MDDimensionExtents.h
index 1427eb2de73b04e1933edafc1d6804c1da95e352..eb1c1396e19a1d2ac430c3dd060c4931d7232dd3 100644
--- a/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/MDDimensionExtents.h
+++ b/Code/Mantid/Framework/MDEvents/inc/MantidMDEvents/MDDimensionExtents.h
@@ -19,7 +19,7 @@ namespace MDEvents
   /** Simple class that holds the extents (min/max)
    * of a given dimension in a MD workspace or MDBox
    */
-  DLLExport class MDDimensionExtents
+  class DLLExport MDDimensionExtents
   {
   public: