diff --git a/include/mapnik/feature_style_processor.hpp b/include/mapnik/feature_style_processor.hpp
index a8047fd0e..07f65a337 100644
--- a/include/mapnik/feature_style_processor.hpp
+++ b/include/mapnik/feature_style_processor.hpp
@@ -47,7 +47,7 @@ struct layer_rendering_material;
 enum eAttributeCollectionPolicy { DEFAULT = 0, COLLECT_ALL = 1 };
 
 template<typename Processor>
-class feature_style_processor
+class MAPNIK_DECL feature_style_processor
 {
   public:
     explicit feature_style_processor(Map const& m, double scale_factor = 1.0);