1 files changed, 3 insertions, 3 deletions
diff --git a/gr-qtgui/lib/qtgui_util.h b/gr-qtgui/lib/qtgui_util.h
index a519c66a2..5b129c7b5 100644
--- a/gr-qtgui/lib/qtgui_util.h
+++ b/gr-qtgui/lib/qtgui_util.h
@@ -24,12 +24,12 @@
 #define INCLUDED_QTGUI_UTIL_H
 
 #include <qevent.h>
-
+#include <gr_qtgui_api.h>
 #include <qwt_plot_picker.h>
 #include <qwt_picker_machine.h>
 
 
-class QwtDblClickPlotPicker: public QwtPlotPicker
+class GR_QTGUI_API QwtDblClickPlotPicker: public QwtPlotPicker
 {
 public:
     QwtDblClickPlotPicker(QwtPlotCanvas *);
@@ -38,7 +38,7 @@ public:
     virtual QwtPickerMachine * stateMachine(int) const;
 };
 
-class QwtPickerDblClickPointMachine: public QwtPickerMachine
+class GR_QTGUI_API QwtPickerDblClickPointMachine: public QwtPickerMachine
 {
 public:
   QwtPickerDblClickPointMachine();