diff --git a/modules/m_relation.cc b/modules/m_relation.cc
index c94faed82..f0d32cf31 100644
--- a/modules/m_relation.cc
+++ b/modules/m_relation.cc
@@ -77,7 +77,7 @@ try
 
 	const json::object &m_in_reply_to
 	{
-		content["m.in_reply_to"]
+		m_relates_to["m.in_reply_to"]
 	};
 
 	const m::event::id &event_id