diff --git a/clientapi/routing/sendevent.go b/clientapi/routing/sendevent.go
index bfb48f3df0..3d28f1e2da 100644
--- a/clientapi/routing/sendevent.go
+++ b/clientapi/routing/sendevent.go
@@ -52,6 +52,12 @@ func SendEvent(
 	rsAPI api.RoomserverInternalAPI,
 	txnCache *transactions.Cache,
 ) util.JSONResponse {
+	prevEvent := req.URL.Query().Get("prev_event")
+
+	util.GetLogger(req.Context()).WithFields(logrus.Fields{
+		"prevEvent": prevEvent,
+	}).Info("prevEvent")
+
 	verReq := api.QueryRoomVersionForRoomRequest{RoomID: roomID}
 	verRes := api.QueryRoomVersionForRoomResponse{}
 	if err := rsAPI.QueryRoomVersionForRoom(req.Context(), &verReq, &verRes); err != nil {