diff --git a/predict/includes/config.inc.php b/predict/includes/config.inc.php
index a084568..1d981c4 100644
--- a/predict/includes/config.inc.php
+++ b/predict/includes/config.inc.php
@@ -1,5 +1,9 @@
 <?php
 
+// Enter the Google Maps API for your site
+define("GMAPS_API_KEY", "ABQIAAAAzpAeP4iTRyyvc3_y95bQZBSnyWegg1iFIOtWV3Ha3Qw-fH3UlBTg9lMAipYdJi6ac4b5hWAzBkkXgg");
+
+// Who should we email about errors etc?
 define("ADMIN_EMAIL", "jon@hexoc.com");
 
 define("LOCATION_SAVE_ENABLE", true);
@@ -13,6 +17,7 @@ define("ROOT", "/var/www/hab/predict/");
 // Path to prediction data dir from predict/
 define("PREDS_PATH", "preds/");
 
+// Filenames used by the predictor
 define("SCENARIO_FILE", "scenario.ini");
 define("FLIGHT_CSV", "flight_path.csv");
 define("PROGRESS_JSON", "progress.json");
diff --git a/predict/index.php b/predict/index.php
index 06a946b..d12d6a1 100644
--- a/predict/index.php
+++ b/predict/index.php
@@ -22,7 +22,8 @@ $time = time() + 3600;
 <head>
 <title>CUSF Landing Predictor 2.0</title>
 <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
-<script type="text/javascript" src="http://www.google.com/jsapi?key=ABQIAAAAzpAeP4iTRyyvc3_y95bQZBSnyWegg1iFIOtWV3Ha3Qw-fH3UlBTg9lMAipYdJi6ac4b5hWAzBkkXgg"></script>
+<script type="text/javascript" src="http://www.google.com/jsapi?key=<?php echo GMAPS_API_KEY; ?>">
+</script>
 <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
 <link href="css/pred.css" type="text/css" rel="stylesheet">
 <link href="css/cupertino/jquery-ui-1.8.1.custom.css" type="text/css" rel="stylesheet">
