diff --git a/include/mapnik/markers_placement.hpp b/include/mapnik/markers_placement.hpp
index 52aecc3d9..6db046a33 100644
--- a/include/mapnik/markers_placement.hpp
+++ b/include/mapnik/markers_placement.hpp
@@ -31,9 +31,7 @@
 #include <mapnik/symbolizer_enumerations.hpp>
 #include <mapnik/util/variant.hpp>
 #include <boost/functional/value_factory.hpp>
-
-// stl
-#include <map>
+#include <boost/function.hpp>
 
 namespace mapnik
 {
@@ -88,7 +86,7 @@ private:
                                     Detector &detector,
                                     markers_placement_params const& params)
     {
-        static const std::map<marker_placement_e, std::function<markers_placement(
+        static const std::map<marker_placement_e, boost::function<markers_placement(
             Locator &locator,
             Detector &detector,
             markers_placement_params const& params)>> factories =