diff --git a/lib/nntp/tiny/message.py b/lib/nntp/tiny/message.py
index f3ee305..882b49c 100644
--- a/lib/nntp/tiny/message.py
+++ b/lib/nntp/tiny/message.py
@@ -341,6 +341,8 @@ class Message(DatabaseTable):
             self.content += self.line
             self._body   += self.line
 
+            self.line = None
+
     def read(self, text: str):
         for line in each_line(text):
             self.readline(line)