diff --git a/federationapi/routing/devices.go b/federationapi/routing/devices.go
index 593551e6f..d942083ec 100644
--- a/federationapi/routing/devices.go
+++ b/federationapi/routing/devices.go
@@ -20,6 +20,7 @@ import (
 	keyapi "github.com/matrix-org/dendrite/keyserver/api"
 	"github.com/matrix-org/gomatrixserverlib"
 	"github.com/matrix-org/util"
+	"github.com/sirupsen/logrus"
 )
 
 // GetUserDevices for the given user id
@@ -44,6 +45,8 @@ func GetUserDevices(
 	for _, dev := range res.Devices {
 		sigReq.TargetIDs[userID] = append(sigReq.TargetIDs[userID], gomatrixserverlib.KeyID(dev.DeviceID))
 	}
+	logrus.Infof("Signatures request: %+v", sigReq)
+	logrus.Infof("Signatures response: %+v", sigRes)
 	keyAPI.QuerySignatures(req.Context(), sigReq, sigRes)
 
 	response := gomatrixserverlib.RespUserDevices{