diff --git a/include/mapnik/json/generic_json_grammar_x3_def.hpp b/include/mapnik/json/generic_json_grammar_x3_def.hpp
index 5408a2220..98ed4674e 100644
--- a/include/mapnik/json/generic_json_grammar_x3_def.hpp
+++ b/include/mapnik/json/generic_json_grammar_x3_def.hpp
@@ -73,7 +73,7 @@ namespace { auto const& json_string = mapnik::json::unicode_string_grammar(); }
 
 // exported rules
 // start
-generic_json_grammar_type const value("JSON Value");
+generic_json_grammar_type const value __attribute__((init_priority(102))) ("JSON Value");
 generic_json_key_value_type const key_value("JSON Object element");
 // rules
 x3::rule<class json_object_tag, json_object> const object("JSON Object");
diff --git a/include/mapnik/json/geojson_grammar_x3_def.hpp b/include/mapnik/json/geojson_grammar_x3_def.hpp
index 545826e7b..407e87fdc 100644
--- a/include/mapnik/json/geojson_grammar_x3_def.hpp
+++ b/include/mapnik/json/geojson_grammar_x3_def.hpp
@@ -89,8 +89,8 @@ struct geometry_type_ : x3::symbols<mapnik::geometry::geometry_types>
 
 // exported rules
 // start
-geojson_grammar_type const value("JSON Value");
-key_value_type const key_value("JSON key/value");
+geojson_grammar_type const value  __attribute__((init_priority(106))) ("JSON Value");
+key_value_type const key_value  __attribute__((init_priority(107))) ("JSON key/value");
 // rules
 x3::rule<class json_object_tag, geojson_object> const object("JSON Object");
 x3::rule<class json_array_tag, geojson_array> const array("JSON Array");
diff --git a/include/mapnik/json/positions_grammar_x3_def.hpp b/include/mapnik/json/positions_grammar_x3_def.hpp
index 6f6b96500..2dec62fec 100644
--- a/include/mapnik/json/positions_grammar_x3_def.hpp
+++ b/include/mapnik/json/positions_grammar_x3_def.hpp
@@ -42,7 +42,7 @@ auto assign_helper = [](auto const& ctx)
 } // anonymous ns
 
 // start rule
-positions_grammar_type const positions("Positions");
+positions_grammar_type const positions __attribute__((init_priority(103))) ("Positions");
 // rules
 x3::rule<class point_class, point> const point("Position");
 x3::rule<class ring_class, ring> const ring("Ring");
diff --git a/include/mapnik/json/topojson_grammar_x3_def.hpp b/include/mapnik/json/topojson_grammar_x3_def.hpp
index 7200fdbd3..f1e0481a8 100644
--- a/include/mapnik/json/topojson_grammar_x3_def.hpp
+++ b/include/mapnik/json/topojson_grammar_x3_def.hpp
@@ -304,7 +304,7 @@ struct topojson_geometry_type_ : x3::symbols<int>
 } topojson_geometry_type;
 
 // start rule
-topojson_grammar_type const topology = "Topology";
+topojson_grammar_type const topology __attribute__((init_priority(104))) ("Topology");
 // rules
 x3::rule<class transform_tag, mapnik::topojson::transform> const transform = "Transform";
 x3::rule<class bbox_tag, mapnik::topojson::bounding_box> const bbox = "Bounding Box";
@@ -373,7 +373,7 @@ auto const geometry_tuple_def =
      |
      properties[assign_properties]
      |
-     (omit[json_string] > lit(':') > omit[json_value])) % lit(',')
+     omit[json_string] > lit(':') > omit[json_value]) % lit(',')
     ;
 
 auto const geometry_def = lit("{") > geometry_tuple[create_geometry] > lit("}");
diff --git a/include/mapnik/json/unicode_string_grammar_x3_def.hpp b/include/mapnik/json/unicode_string_grammar_x3_def.hpp
index 039e2d624..3234c73fa 100644
--- a/include/mapnik/json/unicode_string_grammar_x3_def.hpp
+++ b/include/mapnik/json/unicode_string_grammar_x3_def.hpp
@@ -109,7 +109,7 @@ x3::uint_parser<std::uint16_t, 16, 4, 4> const hex4 {};
 x3::uint_parser<uchar, 16, 8, 8> const hex8 {};
 
 // start rule
-unicode_string_grammar_type const unicode_string("Unicode String");
+unicode_string_grammar_type const unicode_string __attribute__((init_priority(101))) ("Unicode String");
 // rules
 x3::rule<class double_quoted_tag, std::string> const double_quoted("Double-quoted string");
 x3::rule<class escaped_tag, std::string> const escaped("Escaped Character");