diff --git a/Code/Mantid/MantidQt/SliceViewer/inc/MantidQtSliceViewer/LinePlotOptions.h b/Code/Mantid/MantidQt/SliceViewer/inc/MantidQtSliceViewer/LinePlotOptions.h
index 5d54824bbb182344d8d01067a743317aeb73e6c1..39dea2d86f05da52c8d45d191c764c5f29b5fe65 100644
--- a/Code/Mantid/MantidQt/SliceViewer/inc/MantidQtSliceViewer/LinePlotOptions.h
+++ b/Code/Mantid/MantidQt/SliceViewer/inc/MantidQtSliceViewer/LinePlotOptions.h
@@ -42,9 +42,6 @@ private:
   /// Vector of the various plot axis radio buttons
   QVector<QRadioButton *> m_radPlots;
 
-  /// Original workspace (gives the dimensions to plot);
-  Mantid::API::IMDWorkspace_sptr m_originalWs;
-
   /// Chosen plot X-axis
   int m_plotAxis;
 
diff --git a/Code/Mantid/MantidQt/SliceViewer/src/LinePlotOptions.cpp b/Code/Mantid/MantidQt/SliceViewer/src/LinePlotOptions.cpp
index 08cc23e9a959a140838a1fc816bb64c99c700981..79d02742944ea92bfe83c0302bb2969a92cc2ef3 100644
--- a/Code/Mantid/MantidQt/SliceViewer/src/LinePlotOptions.cpp
+++ b/Code/Mantid/MantidQt/SliceViewer/src/LinePlotOptions.cpp
@@ -54,10 +54,10 @@ void LinePlotOptions::addPlotRadioButton(const std::string & text, const std::st
 void LinePlotOptions::setOriginalWorkspace(Mantid::API::IMDWorkspace_sptr ws)
 {
   if (!ws) return;
-  m_originalWs = ws;
-  for (size_t d=0; d<(m_originalWs->getNumDims()); d++)
+
+  for (size_t d=0; d<(ws->getNumDims()); d++)
   {
-    IMDDimension_const_sptr dim = m_originalWs->getDimension(d);
+    IMDDimension_const_sptr dim = ws->getDimension(d);
     std::string text = dim->getName();
     std::string tooltip = "Use the "+dim->getName()+" dimension as the X plot axis.";
     const bool bIntegrated = dim->getIsIntegrated();