diff --git a/lib/nntp/tiny/mbox.py b/lib/nntp/tiny/mbox.py
index c52f1cc..8ecca12 100644
--- a/lib/nntp/tiny/mbox.py
+++ b/lib/nntp/tiny/mbox.py
@@ -86,12 +86,12 @@ class MBoxReader():
                     ret = self.message
 
                     self.message = Message()
-                    self.message.add(line)
+                    self.message.parse_line(line)
 
                     return ret
 
             if self.message:
-                self.message.add(line)
+                self.message.parse_line(line)
 
     def messages(self):
         while True:
diff --git a/lib/nntp/tiny/message.py b/lib/nntp/tiny/message.py
index 2003879..589e54f 100644
--- a/lib/nntp/tiny/message.py
+++ b/lib/nntp/tiny/message.py
@@ -120,7 +120,7 @@ class Message(DatabaseTable):
     def is_first_line(self):
         return len(self.headers) == 1 and (self.body == '' or self.body is None)
 
-    def _parse_line(self, line: str):
+    def parse_line(self, line: str):
         if self.line is not None:
             self.content += self.line
 
@@ -152,6 +152,6 @@ class Message(DatabaseTable):
         message = Message()
 
         for line in each_line(text):
-            message._parse_line(line)
+            message.parse_line(line)
 
         return message