diff --git a/client.go b/client.go
index bdffb3f..3f7ea1d 100644
--- a/client.go
+++ b/client.go
@@ -19,6 +19,7 @@ var (
 	ErrAuthNeeded          = errors.New("point-api: Authentication needed")
 	ErrNoNextPage          = errors.New("point-api: Page has next_page: false")
 	ErrAuthorPrivacy       = errors.New("point-api: Post author privacy error")
+	ErrWebSocketPing       = errors.New("point-api: WebSocket ping received instead of message")
 )
 
 type PointClient struct {