diff --git a/include/mapnik/json/extract_bounding_box_grammar_impl.hpp b/include/mapnik/json/extract_bounding_box_grammar_impl.hpp
index c6fd321ba..c497669a2 100644
--- a/include/mapnik/json/extract_bounding_box_grammar_impl.hpp
+++ b/include/mapnik/json/extract_bounding_box_grammar_impl.hpp
@@ -78,6 +78,8 @@ extract_bounding_box_grammar<Iterator, ErrorHandler>::extract_bounding_box_gramm
                                        |
                                        coords[_b = _1]
                                        |
+                                       json.string_
+                                       |
                                        char_))][push_box(_r1, _r2, _b, _1)]
         ;