diff --git a/src/Geolocation.php b/src/Geolocation.php
index e38bf26..e0ff3a4 100644
--- a/src/Geolocation.php
+++ b/src/Geolocation.php
@@ -79,6 +79,11 @@ protected function doCall($parameters = array())
         // redefine response as json decoded
         $response = json_decode($response);
 
+        // API returns with an error
+        if (isset($response->error_message)) {
+            throw new GeolocationException($response->error_message);
+        }
+
         // return the content
         return $response->results;
     }