diff --git a/Trustly/Api/api.php b/Trustly/Api/api.php
index c9fee7d..f8e89e2 100644
--- a/Trustly/Api/api.php
+++ b/Trustly/Api/api.php
@@ -91,7 +91,7 @@ public function __construct($host='trustly.com', $port=443, $is_https=TRUE) {
 
 		if($this->loadTrustlyPublicKey($host, $port, $is_https) === FALSE) {
 			$error = openssl_error_string();
-			throw new InvalidArgumentException("Cannot load Trustly public key file for host $host".(isset($error)?", error $error":''));
+			throw new InvalidArgumentException("Cannot load Trustly public key file for host $host".($error?", error $error":''));
 		}
 
 		/* Make sure the curl extension is loaded so we can open URL's */
@@ -264,7 +264,7 @@ public function setHost($host=NULL, $port=NULL, $is_https=NULL) {
 
 		if($this->loadTrustlyPublicKey($host, $port) === FALSE) {
 			$error = openssl_error_string();
-			throw new InvalidArgumentException("Cannot load Trustly public key file for host $host".(isset($error)?", error $error":''));
+			throw new InvalidArgumentException("Cannot load Trustly public key file for host $host".($error?", error $error":''));
 		}
 
 		if(isset($is_https)) {