diff --git a/modules/geolocation_googlemaps/geolocation_googlemaps.module b/modules/geolocation_googlemaps/geolocation_googlemaps.module
index 93bf1c0..46a24a4 100644
--- a/modules/geolocation_googlemaps/geolocation_googlemaps.module
+++ b/modules/geolocation_googlemaps/geolocation_googlemaps.module
@@ -174,6 +174,8 @@ function geolocation_googlemaps_field_formatter_view($entity_type, $entity, $fie
   $settings = $display['settings'];
   $element = array();
   $lat_key = 'lat';
+  // To make this widget compatible with geofiled we need to rename the keys for
+  // longitude. Geofield uses "lon" while Geolocation Field uses "lng".
   $lng_key = ($field['type'] == 'geofield') ? 'lon' : 'lng';
 
   switch ($display['type']) {