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-rw-r--r--libs/gtkmm2ext/gtkmm2ext/fastmeter.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/libs/gtkmm2ext/gtkmm2ext/fastmeter.h b/libs/gtkmm2ext/gtkmm2ext/fastmeter.h
index 8070748963..6802481777 100644
--- a/libs/gtkmm2ext/gtkmm2ext/fastmeter.h
+++ b/libs/gtkmm2ext/gtkmm2ext/fastmeter.h
@@ -27,9 +27,11 @@
#include <gtkmm/drawingarea.h>
#include <gdkmm/pixbuf.h>
+#include "gtkmm2ext/visibility.h"
+
namespace Gtkmm2ext {
-class FastMeter : public Gtk::DrawingArea {
+class LIBGTKMM2EXT_API FastMeter : public Gtk::DrawingArea {
public:
enum Orientation {
Horizontal,