diff --git a/include/mapnik/image_filter_grammar.hpp b/include/mapnik/image_filter_grammar.hpp
index ef9b6697b..176c84e02 100644
--- a/include/mapnik/image_filter_grammar.hpp
+++ b/include/mapnik/image_filter_grammar.hpp
@@ -31,7 +31,6 @@
 #pragma GCC diagnostic push
 #include <mapnik/warning_ignore.hpp>
 #include <boost/spirit/include/qi.hpp>
-#include <boost/fusion/include/adapt_struct.hpp>
 #pragma GCC diagnostic pop
 
 // stl
@@ -44,16 +43,6 @@ struct color_stop;
 struct colorize_alpha;
 }
 
-}
-
-BOOST_FUSION_ADAPT_STRUCT(
-    mapnik::filter::color_stop,
-    (mapnik::color, color )
-    (double, offset)
-)
-
-namespace mapnik {
-
 namespace qi = boost::spirit::qi;
 
 struct percent_offset_impl
diff --git a/include/mapnik/image_filter_grammar_impl.hpp b/include/mapnik/image_filter_grammar_impl.hpp
index 4dfa54038..7b8212ec7 100644
--- a/include/mapnik/image_filter_grammar_impl.hpp
+++ b/include/mapnik/image_filter_grammar_impl.hpp
@@ -26,9 +26,16 @@
 
 #pragma GCC diagnostic push
 #include <mapnik/warning_ignore.hpp>
+#include <boost/fusion/include/adapt_struct.hpp>
 #include <boost/spirit/include/phoenix.hpp>
 #pragma GCC diagnostic pop
 
+BOOST_FUSION_ADAPT_STRUCT(
+    mapnik::filter::color_stop,
+    (mapnik::color, color )
+    (double, offset)
+)
+
 namespace mapnik {
 
 namespace qi = boost::spirit::qi;