diff --git a/helper/geojsonify.js b/helper/geojsonify.js
index ef998463..b3486a3e 100644
--- a/helper/geojsonify.js
+++ b/helper/geojsonify.js
@@ -27,7 +27,7 @@ function search( docs, params ){
   var geodata = docs.map( function( doc ) {
 
     // something went very wrong
-    if( !doc || !doc.center_point ) {
+    if( !doc || !doc.hasOwnProperty( 'center_point' ) ) {
       return warning();
     }