diff --git a/include/mapnik/feature_type_style.hpp b/include/mapnik/feature_type_style.hpp
index 238622021..a6e63d527 100644
--- a/include/mapnik/feature_type_style.hpp
+++ b/include/mapnik/feature_type_style.hpp
@@ -28,7 +28,7 @@
 #include <mapnik/enumeration.hpp>
 #include <mapnik/image_filter_types.hpp>
 #include <mapnik/image_compositing.hpp>
-
+#include <mapnik/rule.hpp>
 #include <mapnik/warning.hpp>
 MAPNIK_DISABLE_WARNING_PUSH
 #include <mapnik/warning_ignore.hpp>
@@ -41,8 +41,6 @@ MAPNIK_DISABLE_WARNING_POP
 
 namespace mapnik {
 
-class rule;
-
 enum class filter_mode_enum { FILTER_ALL, FILTER_FIRST, filter_mode_enum_MAX };
 
 DEFINE_ENUM(filter_mode_e, filter_mode_enum);