diff --git a/lib/runkeeperAPI.class.php b/lib/runkeeperAPI.class.php
index a9d4a96..20c2d38 100644
--- a/lib/runkeeperAPI.class.php
+++ b/lib/runkeeperAPI.class.php
@@ -107,7 +107,7 @@ public function getRunkeeperToken ($authorization_code, $redirect_uri='') {
 			$this->api_last_error = "getRunkeeperToken: bad response";
 			return(false);
 		}
-		elseif (!$decoderesponse->error) {
+		elseif (!isset($decoderesponse->error)){
 			if ($decoderesponse->access_token) {
 				$this->access_token = $decoderesponse->access_token;
 			}