diff --git a/files/classes/comment.py b/files/classes/comment.py
index e08924219..f27499af9 100644
--- a/files/classes/comment.py
+++ b/files/classes/comment.py
@@ -47,7 +47,7 @@ class Comment(Base):
 	post = relationship("Submission", viewonly=True)
 	flags = relationship("CommentFlag", lazy="dynamic", viewonly=True)
 	author = relationship("User", primaryjoin="User.id==Comment.author_id")
-	sendtouser = relationship("User", primaryjoin="User.id==Comment.sentto")
+	senttouser = relationship("User", primaryjoin="User.id==Comment.sentto", viewonly=True)
 	parent_comment = relationship("Comment", remote_side=[id], viewonly=True)
 	child_comments = relationship("Comment", remote_side=[parent_comment_id], viewonly=True)
 	awards = relationship("AwardRelationship", viewonly=True)