diff --git a/modules/oauth2/lib/DrupalOAuth2Client.inc b/modules/oauth2/lib/DrupalOAuth2Client.inc
index 49b1f12..9738bd6 100644
--- a/modules/oauth2/lib/DrupalOAuth2Client.inc
+++ b/modules/oauth2/lib/DrupalOAuth2Client.inc
@@ -92,7 +92,7 @@ class DrupalOAuth2Client extends DrupalOAuthClient {
         $params[$param_key] = $param_value;
       }
     }
-    if (!empty($params)) {
+    if (!empty($params) && $options['get']) {
       $url .= '?' . drupal_http_build_query($params);
     }
     $headers = array(