diff --git a/eml_parser/parser.py b/eml_parser/parser.py
index 871ff1b..011b2b9 100644
--- a/eml_parser/parser.py
+++ b/eml_parser/parser.py
@@ -892,7 +892,7 @@ def get_raw_body_text(self, msg: email.message.Message, boundary: typing.Optiona
             # pylint: disable=too-many-boolean-expressions
             if (
                 ('content-disposition' not in msg and msg.get_content_maintype() == 'text')
-                or (filename.endswith('.html') or filename.endswith('.htm'))
+                or (filename.endswith(('.html', '.htm')))
                 or ('content-disposition' in msg and msg.get_content_disposition() == 'inline' and msg.get_content_maintype() == 'text')
             ):
                 encoding = msg.get('content-transfer-encoding', '').lower()