diff --git a/include/mapnik/params.hpp b/include/mapnik/params.hpp
index 439415f06..13d030a23 100644
--- a/include/mapnik/params.hpp
+++ b/include/mapnik/params.hpp
@@ -28,7 +28,7 @@
 #include <mapnik/value_types.hpp>
 
 // boost
-#include <boost/variant/variant_fwd.hpp>
+#include <boost/variant/variant.hpp>
 #include <boost/optional.hpp>
 
 // stl