diff --git a/lib/PhpParser/BuilderFactory.php b/lib/PhpParser/BuilderFactory.php
index c28f40f..ee85558 100644
--- a/lib/PhpParser/BuilderFactory.php
+++ b/lib/PhpParser/BuilderFactory.php
@@ -104,7 +104,7 @@ class BuilderFactory
     /**
      * Creates a namespace/class use builder.
      *
-     * @param string|Node\Name Name to alias
+     * @param string|Node\Name $name Name to alias
      *
      * @return Builder\Use_ The create use builder
      */
diff --git a/lib/PhpParser/Error.php b/lib/PhpParser/Error.php
index cedb412..d1fb959 100644
--- a/lib/PhpParser/Error.php
+++ b/lib/PhpParser/Error.php
@@ -15,7 +15,7 @@ class Error extends \RuntimeException
      *                              (or start line of error -- deprecated)
      */
     public function __construct(string $message, $attributes = []) {
-        $this->rawMessage = (string) $message;
+        $this->rawMessage = $message;
         if (is_array($attributes)) {
             $this->attributes = $attributes;
         } else {
@@ -76,7 +76,7 @@ class Error extends \RuntimeException
      * @param string $message Error message
      */
     public function setRawMessage(string $message) {
-        $this->rawMessage = (string) $message;
+        $this->rawMessage = $message;
         $this->updateMessage();
     }
 
@@ -86,7 +86,7 @@ class Error extends \RuntimeException
      * @param int $line Error start line
      */
     public function setStartLine(int $line) {
-        $this->attributes['startLine'] = (int) $line;
+        $this->attributes['startLine'] = $line;
         $this->updateMessage();
     }