diff --git a/pkg/connector/userinfo.go b/pkg/connector/userinfo.go
index 39a5f7f..3b1db10 100644
--- a/pkg/connector/userinfo.go
+++ b/pkg/connector/userinfo.go
@@ -151,16 +151,36 @@ func (lc *LineClient) GetChatInfo(ctx context.Context, portal *bridgev2.Portal)
 	mid := string(portal.ID)
 	lowerMid := strings.ToLower(mid)
 	if strings.HasPrefix(lowerMid, "c") || strings.HasPrefix(lowerMid, "r") {
-		_, res, err := callLineResult(lc, ctx, func(client *line.Client) (*line.GetChatsResponse, error) {
-			return client.GetChats([]string{mid}, true, true)
-		})
-		if err != nil {
-			return nil, err
-		}
-		if len(res.Chats) == 0 {
-			return nil, fmt.Errorf("chat not found")
+		var chat *line.Chat
+		if strings.HasPrefix(lowerMid, "r") {
+			// Legacy multi-person rooms aren't returned by getChats.
+			_, rooms, err := callLineResult(lc, ctx, func(client *line.Client) ([]line.Room, error) {
+				return client.GetRoomsV2([]string{mid})
+			})
+			if err != nil {
+				return nil, err
+			}
+			if len(rooms) == 0 {
+				return nil, fmt.Errorf("room not found")
+			}
+			chat = &line.Chat{
+				ChatMid: mid,
+				Type:    1,
+				Extra:   line.ChatExtra{GroupExtra: &line.GroupExtra{MemberMids: rooms[0].MemberMids}},
+			}
+		} else {
+			_, res, err := callLineResult(lc, ctx, func(client *line.Client) (*line.GetChatsResponse, error) {
+				return client.GetChats([]string{mid}, true, true)
+			})
+			if err != nil {
+				return nil, err
+			}
+			if len(res.Chats) == 0 {
+				return nil, fmt.Errorf("chat not found")
+			}
+			chat = &res.Chats[0]
 		}
-		info := lc.chatToChatInfo(ctx, &res.Chats[0], true)
+		info := lc.chatToChatInfo(ctx, chat, true)
 		if portal.MXID == "" && lc.shouldSkipDeletedChat(mid, "") {
 			lc.stripRemoteMembersFromInitialChatInfo(info)
 		}
diff --git a/pkg/line/methods.go b/pkg/line/methods.go
index b08a48a..801e965 100644
--- a/pkg/line/methods.go
+++ b/pkg/line/methods.go
@@ -640,6 +640,25 @@ func (c *Client) GetChats(mids []string, withMembers, withInvitees bool) (*GetCh
 	return &wrapper.Data, nil
 }
 
+func (c *Client) GetRoomsV2(mids []string) ([]Room, error) {
+	resp, err := c.callRPC("TalkService", "getRoomsV2", mids)
+	if err != nil {
+		return nil, err
+	}
+	var wrapper struct {
+		Code    int    `json:"code"`
+		Message string `json:"message"`
+		Data    []Room `json:"data"`
+	}
+	if err := json.Unmarshal(resp, &wrapper); err != nil {
+		return nil, err
+	}
+	if wrapper.Code != 0 {
+		return nil, fmt.Errorf("getRoomsV2 failed: %s", wrapper.Message)
+	}
+	return wrapper.Data, nil
+}
+
 func (c *Client) GetLastOpRevision() (int64, error) {
 	return c.GetLastOpRevisionContext(context.Background())
 }
diff --git a/pkg/line/structs.go b/pkg/line/structs.go
index 1816f6d..43a3abd 100644
--- a/pkg/line/structs.go
+++ b/pkg/line/structs.go
@@ -271,6 +271,10 @@ type Chat struct {
 	Type                 int         `json:"type"` // 0=GROUP, 1=ROOM
 }
 
+type Room struct {
+	MemberMids FlexibleMidMap `json:"memberMids"`
+}
+
 type ChatExtra struct {
 	GroupExtra *GroupExtra `json:"groupExtra,omitempty"`
 	PeerExtra  *PeerExtra  `json:"peerExtra,omitempty"`