diff --git a/includes/polling/functions.inc.php b/includes/polling/functions.inc.php
index 243fe77dc..4eb12609b 100644
--- a/includes/polling/functions.inc.php
+++ b/includes/polling/functions.inc.php
@@ -431,7 +431,13 @@ function location_to_latlng($device) {
                 case "google":
                 default:
                     d_echo("Google geocode engine being used\n");
-                    $api_url = "https://maps.googleapis.com/maps/api/geocode/json?address=$new_device_location";
+                    $api_key = ($config['geoloc']['api_key']);
+                    if (!empty($api_key)) {
+                        d_echo("Use Google API key: $api_key\n");
+                        $api_url = "https://maps.googleapis.com/maps/api/geocode/json?address=$new_device_location&key=$api_key";
+                    } else {
+                        $api_url = "https://maps.googleapis.com/maps/api/geocode/json?address=$new_device_location";
+                    }
                 break;
             }
             $curl_init = curl_init($api_url);