diff --git a/geojson.c b/geojson.c
index 662b32e..fbfb067 100644
--- a/geojson.c
+++ b/geojson.c
@@ -402,7 +402,7 @@ void read_json(FILE *f, char *fname, char *layername, int maxzoom, int minzoom,
 				serialize_string(metafile, metaval[i], &fpos, fname, jp);
 			}
 
-			int z = 14;
+			int z = maxzoom;
 
 			unsigned cx = bbox[0] / 2 + bbox[2] / 2;
 			unsigned cy = bbox[1] / 2 + bbox[3] / 2;