diff --git a/lib/mbtiles.js b/lib/mbtiles.js
index 335c934..93f7c91 100644
--- a/lib/mbtiles.js
+++ b/lib/mbtiles.js
@@ -400,7 +400,7 @@ MBTiles.prototype.getInfo = function(callback) {
             (info.bounds[3] - info.bounds[1]) / 2 + info.bounds[1],
             (range <= 1) ? info.maxzoom : Math.floor(range * 0.5) + info.minzoom
         ];
-        if (info.center && (info.center.length !== 3 || info.center[0] === null)) {
+        if (info.center && (info.center.length !== 3 || info.center[0] === null || isNaN(info.center[2]))) {
             delete info.center;
         }