diff --git a/utils/svg2png/svg2png.cpp b/utils/svg2png/svg2png.cpp
index 18b15e8e4..8484cf74d 100644
--- a/utils/svg2png/svg2png.cpp
+++ b/utils/svg2png/svg2png.cpp
@@ -102,7 +102,7 @@ struct main_marker_visitor
         pixfmt pixf(buf);
         renderer_base renb(pixf);
 
-        mapnik::box2d<double> const& bbox = {0, 0, svg_width, svg_height};
+        mapnik::box2d<double> bbox = {0, 0, svg_width, svg_height};
         // center the svg marker on '0,0'
         agg::trans_affine mtx = agg::trans_affine_translation(-0.5 * w, -0.5 * h);
         // Scale the image