diff --git a/src/XmlDocumentReader.php b/src/XmlDocumentReader.php
index cc792b5..925177b 100644
--- a/src/XmlDocumentReader.php
+++ b/src/XmlDocumentReader.php
@@ -73,6 +73,7 @@ public function loadFromXmlString(string $source): XmlDocumentReader
         $prevUseInternalErrors = \libxml_use_internal_errors(true);
 
         try {
+            libxml_clear_errors();
             $this->internalDomDocument->loadXML($source);
             if (libxml_get_last_error()) {
                 throw new RuntimeException("Invalid XML detected.");