diff --git a/include/mapnik/json/feature_grammar_x3_def.hpp b/include/mapnik/json/feature_grammar_x3_def.hpp
index d05219350..310d74048 100644
--- a/include/mapnik/json/feature_grammar_x3_def.hpp
+++ b/include/mapnik/json/feature_grammar_x3_def.hpp
@@ -140,11 +140,12 @@ using x3::omit;
 using x3::char_;
 
 namespace {
-auto const& value = generic_json_grammar();
 // import unicode string rule
 auto const& geojson_string = unicode_string_grammar();
 // import positions rule
 auto const& positions_rule = positions_grammar();
+// import generic rule
+auto const& value = generic_json_grammar();
 }
 
 // geometry types symbols
@@ -235,13 +236,15 @@ auto assign_property = [](auto const& ctx)
 
 //exported rules
 feature_grammar_type const feature_rule = "Feature Rule";
-geometry_grammar_type const geometry_rule = "Feature Rule";
+geometry_grammar_type const geometry_rule = "Geometry Rule";
 
 // rules
 x3::rule<struct feature_type_tag> const feature_type = "Feature Type";
 x3::rule<struct geometry_type_tag, mapnik::geometry::geometry_types> const geometry_type = "Geometry Type";
 x3::rule<struct coordinates_tag, mapnik::json::positions> const coordinates = "Coordinates";
-x3::rule<struct geomerty_tag, std::tuple<mapnik::geometry::geometry_types, mapnik::json::positions, mapnik::geometry::geometry_collection<double>>> const geometry_tuple = "Geometry";
+x3::rule<struct geomerty_tag, std::tuple<mapnik::geometry::geometry_types,
+                                         mapnik::json::positions,
+                                         mapnik::geometry::geometry_collection<double>>> const geometry_tuple = "Geometry";
 x3::rule<struct property, std::tuple<std::string, json_value>> const property = "Property";
 x3::rule<struct properties_tag> const properties = "Properties";
 x3::rule<struct feature_part_rule_tag> const feature_part = "Feature part";
@@ -305,18 +308,4 @@ BOOST_SPIRIT_DEFINE(
 
 }}}
 
-namespace mapnik { namespace json {
-
-grammar::feature_grammar_type const& feature_grammar()
-{
-    return grammar::feature_rule;
-}
-
-grammar::geometry_grammar_type const& geometry_grammar()
-{
-    return grammar::geometry_rule;
-}
-
-}}
-
 #endif // MAPNIK_JSON_FEATURE_GRAMMAR_X3_DEF_HPP
diff --git a/include/mapnik/json/generic_json_grammar_x3_def.hpp b/include/mapnik/json/generic_json_grammar_x3_def.hpp
index c16d9477a..5408a2220 100644
--- a/include/mapnik/json/generic_json_grammar_x3_def.hpp
+++ b/include/mapnik/json/generic_json_grammar_x3_def.hpp
@@ -67,6 +67,10 @@ auto assign_value = [](auto const& ctx)
 
 using x3::lit;
 using x3::string;
+
+// import unicode string rule
+namespace { auto const& json_string = mapnik::json::unicode_string_grammar(); }
+
 // exported rules
 // start
 generic_json_grammar_type const value("JSON Value");
@@ -79,9 +83,7 @@ x3::rule<class json_number_tag, json_value> const number("JSON Number");
 auto const json_double = x3::real_parser<value_double, x3::strict_real_policies<value_double>>();
 auto const json_integer = x3::int_parser<value_integer, 10, 1, -1>();
 
-// import unicode string rule
-namespace { auto const& json_string = mapnik::json::unicode_string_grammar(); }
- // generic json types
+// generic json types
 auto const value_def = object | array | json_string | number
     ;
 
@@ -120,17 +122,5 @@ BOOST_SPIRIT_DEFINE(
 
 }}}
 
-namespace mapnik { namespace json {
-
-grammar::generic_json_grammar_type const& generic_json_grammar()
-{
-    return grammar::value;
-}
-grammar::generic_json_key_value_type const& generic_json_key_value()
-{
-    return grammar::key_value;
-}
-
-}}
 
 #endif // MAPNIK_JSON_GENERIC_JSON_GRAMMAR_X3_DEF_HPP
diff --git a/include/mapnik/json/geojson_grammar_x3_def.hpp b/include/mapnik/json/geojson_grammar_x3_def.hpp
index a7915e0e8..545826e7b 100644
--- a/include/mapnik/json/geojson_grammar_x3_def.hpp
+++ b/include/mapnik/json/geojson_grammar_x3_def.hpp
@@ -166,18 +166,4 @@ BOOST_SPIRIT_DEFINE(
 
 }}}
 
-namespace mapnik { namespace json {
-
-grammar::geojson_grammar_type const& geojson_grammar()
-{
-    return grammar::value;
-}
-
-grammar::key_value_type const& key_value_grammar()
-{
-    return grammar::key_value;
-}
-
-}}
-
 #endif // MAPNIK_JSON_GEOJSON_GRAMMAR_X3_DEF_HPP
diff --git a/include/mapnik/json/positions_grammar_x3_def.hpp b/include/mapnik/json/positions_grammar_x3_def.hpp
index f6ef084f9..6f6b96500 100644
--- a/include/mapnik/json/positions_grammar_x3_def.hpp
+++ b/include/mapnik/json/positions_grammar_x3_def.hpp
@@ -64,11 +64,4 @@ BOOST_SPIRIT_DEFINE(
     );
 }}}
 
-namespace mapnik { namespace json {
-grammar::positions_grammar_type const& positions_grammar()
-{
-    return grammar::positions;
-}
-}}
-
 #endif // MAPNIK_JSON_POSITIONS_GRAMMAR_X3_DEF_HPP
diff --git a/include/mapnik/json/topojson_grammar_x3_def.hpp b/include/mapnik/json/topojson_grammar_x3_def.hpp
index d8d7e8aa1..7200fdbd3 100644
--- a/include/mapnik/json/topojson_grammar_x3_def.hpp
+++ b/include/mapnik/json/topojson_grammar_x3_def.hpp
@@ -23,9 +23,9 @@
 #ifndef MAPNIK_JSON_TOPOJSON_GRAMMAR_X3_DEF_HPP
 #define MAPNIK_JSON_TOPOJSON_GRAMMAR_X3_DEF_HPP
 
-#include <mapnik/json/topojson_grammar_x3.hpp>
 #include <mapnik/json/unicode_string_grammar_x3.hpp>
 #include <mapnik/json/generic_json_grammar_x3.hpp>
+#include <mapnik/json/topojson_grammar_x3.hpp>
 #pragma GCC diagnostic push
 #include <mapnik/warning_ignore.hpp>
 #include <boost/fusion/adapted/struct.hpp>
@@ -435,11 +435,4 @@ BOOST_SPIRIT_DEFINE(
 
 }}}
 
-namespace mapnik { namespace json {
-grammar::topojson_grammar_type const& topojson_grammar()
-{
-    return grammar::topology;
-}
-}}
-
 #endif //MAPNIK_TOPOJSON_GRAMMAR_X3_DEF_HPP
diff --git a/include/mapnik/json/unicode_string_grammar_x3_def.hpp b/include/mapnik/json/unicode_string_grammar_x3_def.hpp
index a73a73851..039e2d624 100644
--- a/include/mapnik/json/unicode_string_grammar_x3_def.hpp
+++ b/include/mapnik/json/unicode_string_grammar_x3_def.hpp
@@ -149,11 +149,6 @@ BOOST_SPIRIT_DEFINE(
 
 #pragma GCC diagnostic pop
 
-}
-grammar::unicode_string_grammar_type const& unicode_string_grammar()
-{
-    return grammar::unicode_string;
-}
-}}
+}}}
 
 #endif // MAPNIK_JSON_UNICODE_STRING_GRAMMAR_X3_DEF_HPP
diff --git a/src/json/feature_grammar_x3.cpp b/src/json/feature_grammar_x3.cpp
index e850d76b3..9aa2961a3 100644
--- a/src/json/feature_grammar_x3.cpp
+++ b/src/json/feature_grammar_x3.cpp
@@ -31,4 +31,16 @@ BOOST_SPIRIT_INSTANTIATE(geometry_grammar_type, iterator_type, phrase_parse_cont
 BOOST_SPIRIT_INSTANTIATE_UNUSED(feature_grammar_type, iterator_type, feature_context_type);
 BOOST_SPIRIT_INSTANTIATE_UNUSED(feature_grammar_type, iterator_type, feature_context_const_type);
 
-}}}
+}
+
+grammar::feature_grammar_type const& feature_grammar()
+{
+    return grammar::feature_rule;
+}
+
+grammar::geometry_grammar_type const& geometry_grammar()
+{
+    return grammar::geometry_rule;
+}
+
+}}
diff --git a/src/json/generic_json_grammar_x3.cpp b/src/json/generic_json_grammar_x3.cpp
index 43997d71e..92931be33 100644
--- a/src/json/generic_json_grammar_x3.cpp
+++ b/src/json/generic_json_grammar_x3.cpp
@@ -34,4 +34,15 @@ BOOST_SPIRIT_INSTANTIATE_UNUSED(generic_json_grammar_type, iterator_type, phrase
 BOOST_SPIRIT_INSTANTIATE_UNUSED(generic_json_grammar_type, iterator_type, feature_context_type);
 BOOST_SPIRIT_INSTANTIATE_UNUSED(generic_json_grammar_type, iterator_type, feature_context_const_type);
 
-}}}
+}
+
+grammar::generic_json_grammar_type const& generic_json_grammar()
+{
+    return grammar::value;
+}
+grammar::generic_json_key_value_type const& generic_json_key_value()
+{
+    return grammar::key_value;
+}
+
+}}
diff --git a/src/json/geojson_grammar_x3.cpp b/src/json/geojson_grammar_x3.cpp
index 334188e17..583c9e999 100644
--- a/src/json/geojson_grammar_x3.cpp
+++ b/src/json/geojson_grammar_x3.cpp
@@ -38,4 +38,16 @@ BOOST_SPIRIT_INSTANTIATE_UNUSED(geojson_grammar_type, iterator_type, extract_bou
 BOOST_SPIRIT_INSTANTIATE_UNUSED(geojson_grammar_type, iterator_type, extract_bounding_boxes_context_type_f);
 BOOST_SPIRIT_INSTANTIATE_UNUSED(geojson_grammar_type, iterator_type, extract_bounding_boxes_reverse_context_type_f);
 
-}}}
+}
+
+grammar::geojson_grammar_type const& geojson_grammar()
+{
+    return grammar::value;
+}
+
+grammar::key_value_type const& key_value_grammar()
+{
+    return grammar::key_value;
+}
+
+}}
diff --git a/src/json/positions_grammar_x3.cpp b/src/json/positions_grammar_x3.cpp
index 101f1c725..ab5a0f5fe 100644
--- a/src/json/positions_grammar_x3.cpp
+++ b/src/json/positions_grammar_x3.cpp
@@ -41,4 +41,11 @@ BOOST_SPIRIT_INSTANTIATE_UNUSED(positions_grammar_type, iterator_type, extract_b
 BOOST_SPIRIT_INSTANTIATE_UNUSED(positions_grammar_type, iterator_type, extract_bounding_boxes_context_type_f);
 BOOST_SPIRIT_INSTANTIATE_UNUSED(positions_grammar_type, iterator_type, extract_bounding_boxes_reverse_context_type_f);
 
-}}}
+}
+
+grammar::positions_grammar_type const& positions_grammar()
+{
+    return grammar::positions;
+}
+
+}}
diff --git a/src/json/topojson_grammar_x3.cpp b/src/json/topojson_grammar_x3.cpp
index 1eef5e4b6..536e4675a 100644
--- a/src/json/topojson_grammar_x3.cpp
+++ b/src/json/topojson_grammar_x3.cpp
@@ -27,4 +27,11 @@ namespace mapnik { namespace json { namespace grammar {
 
 BOOST_SPIRIT_INSTANTIATE(topojson_grammar_type, iterator_type, phrase_parse_context_type);
 
-}}}
+}
+
+grammar::topojson_grammar_type const& topojson_grammar()
+{
+    return grammar::topology;
+}
+
+}}
diff --git a/src/json/unicode_string_grammar_x3.cpp b/src/json/unicode_string_grammar_x3.cpp
index 59838b7ab..80c2efc71 100644
--- a/src/json/unicode_string_grammar_x3.cpp
+++ b/src/json/unicode_string_grammar_x3.cpp
@@ -42,5 +42,11 @@ BOOST_SPIRIT_INSTANTIATE_UNUSED(unicode_string_grammar_type, iterator_type, extr
 BOOST_SPIRIT_INSTANTIATE_UNUSED(unicode_string_grammar_type, iterator_type, extract_bounding_boxes_reverse_context_type);
 BOOST_SPIRIT_INSTANTIATE_UNUSED(unicode_string_grammar_type, iterator_type, extract_bounding_boxes_context_type_f);
 BOOST_SPIRIT_INSTANTIATE_UNUSED(unicode_string_grammar_type, iterator_type, extract_bounding_boxes_reverse_context_type_f);
+}
 
-}}}
+grammar::unicode_string_grammar_type const& unicode_string_grammar()
+{
+    return grammar::unicode_string;
+}
+
+}}