diff --git a/clientapi/routing/memberships.go b/clientapi/routing/memberships.go
index 6ddcf1be3..a4086832f 100644
--- a/clientapi/routing/memberships.go
+++ b/clientapi/routing/memberships.go
@@ -57,6 +57,11 @@ func GetMemberships(
 	_ *config.ClientAPI,
 	rsAPI api.RoomserverInternalAPI,
 ) util.JSONResponse {
+	resErr := checkMemberInRoom(req.Context(), rsAPI, device.UserID, roomID)
+	if resErr != nil {
+		return *resErr
+	}
+
 	queryReq := api.QueryMembershipsForRoomRequest{
 		JoinedOnly: joinedOnly,
 		RoomID:     roomID,
diff --git a/roomserver/api/query.go b/roomserver/api/query.go
index 43bbfd16d..657f1a6dd 100644
--- a/roomserver/api/query.go
+++ b/roomserver/api/query.go
@@ -151,8 +151,6 @@ type QueryMembershipsForRoomRequest struct {
 	JoinedOnly bool `json:"joined_only"`
 	// ID of the room to fetch memberships from
 	RoomID string `json:"room_id"`
-	// ID of the user sending the request
-	Sender string `json:"sender"`
 }
 
 // QueryMembershipsForRoomResponse is a response to QueryMembershipsForRoom
diff --git a/roomserver/internal/query/query.go b/roomserver/internal/query/query.go
index 3aa51726e..7ff8d84e4 100644
--- a/roomserver/internal/query/query.go
+++ b/roomserver/internal/query/query.go
@@ -243,11 +243,6 @@ func (r *Queryer) QueryMembershipsForRoom(
 		return err
 	}
 
-	membershipEventNID, stillInRoom, isRoomforgotten, err := r.DB.GetMembership(ctx, info.RoomNID, request.Sender)
-	if err != nil {
-		return err
-	}
-
 	response.IsRoomForgotten = isRoomforgotten
 
 	if membershipEventNID == 0 {