diff --git a/README.md b/README.md
index 6a58ea3..83df041 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@ To read a database, make a GET request as follows:
 `GET /api/last`
 * token - (required) the read token for the database
 * tz - (optional, default UTC) timezone string (e.g. America/Los_Angeles) which will be used to determine the absolute start/end times for the day
-* date - (optional, default to now) specify a full timestamp to return a single record before this date (the point returned will be no more than 24 hours before the given date)
+* before - (optional, default to now) specify a full timestamp to return a single record before this date (the point returned will be no more than 24 hours before the given date)
 * geocode - (optional) if "true", then the location found will be reverse geocoded using [Atlas](https://atlas.p3k.io) to find the city and timezone at the location
 
 
diff --git a/compass/app/Http/Controllers/Api.php b/compass/app/Http/Controllers/Api.php
index fd0e623..27e846f 100644
--- a/compass/app/Http/Controllers/Api.php
+++ b/compass/app/Http/Controllers/Api.php
@@ -189,6 +189,8 @@ class Api extends BaseController
       $geocode = json_decode(curl_exec($ch));
       if($geocode) {
         $response['geocode'] = $geocode;
+      } else {
+        $response['geocode'] = null;
       }
     }