diff --git a/libs/gtkmm2ext/gtkmm2ext/cursors.h b/libs/gtkmm2ext/gtkmm2ext/cursors.h
index 6a5308b2b6..10874b6dbd 100644
--- a/libs/gtkmm2ext/gtkmm2ext/cursors.h
+++ b/libs/gtkmm2ext/gtkmm2ext/cursors.h
@@ -23,9 +23,11 @@
 #include <string>
 #include <map>
 
+#include "gtkmm2ext/visibility.h"
+
 namespace Gtkmm2ext {
 
-class CursorInfo 
+class LIBGTKMM2EXT_API CursorInfo 
 {
     public:
         static CursorInfo* lookup_cursor_info (const std::string& image_name);