diff --git a/apps/vaporgui/PDatasetTransformWidget.cpp b/apps/vaporgui/PDatasetTransformWidget.cpp
index 164259816e..182efeb4e6 100644
--- a/apps/vaporgui/PDatasetTransformWidget.cpp
+++ b/apps/vaporgui/PDatasetTransformWidget.cpp
@@ -8,6 +8,7 @@
 
 using namespace VAPoR;
 
+const std::string PDatasetTransformWidget::SelectedDatasetTag = "transformWidgetDatasetTag";
 
 PDatasetTransformWidget::PDatasetTransformWidget(VAPoR::ControlExec *ce)
 : PWidget("", _section = new VSectionGroup("Transform",
diff --git a/apps/vaporgui/PDatasetTransformWidget.h b/apps/vaporgui/PDatasetTransformWidget.h
index 272d55f1e5..794924233c 100644
--- a/apps/vaporgui/PDatasetTransformWidget.h
+++ b/apps/vaporgui/PDatasetTransformWidget.h
@@ -11,11 +11,11 @@ class PTransformWidget;
 
 
 class PDatasetTransformWidget : public PWidget {
-    VAPoR::ControlExec *_ce;
-    VSection *          _section;
-    PStringDropdown *   _twDataset;
-    PTransformWidget *  _tw;
-    const std::string   SelectedDatasetTag = "transformWidgetDatasetTag";
+    VAPoR::ControlExec *     _ce;
+    VSection *               _section;
+    PStringDropdown *        _twDataset;
+    PTransformWidget *       _tw;
+    static const std::string SelectedDatasetTag;
 
 public:
     PDatasetTransformWidget(VAPoR::ControlExec *ce);