diff --git a/td/generate/scheme/td_api.tl b/td/generate/scheme/td_api.tl
index b07b5d254..06f62d8cb 100644
--- a/td/generate/scheme/td_api.tl
+++ b/td/generate/scheme/td_api.tl
@@ -2118,7 +2118,7 @@ keyboardButton text:string type:KeyboardButtonType = KeyboardButton;
 
 //@class InlineKeyboardButtonType @description Describes the type of inline keyboard button
 
-//@description A button that opens a specified URL @url HTTP or tg:// URL to open
+//@description A button that opens a specified URL @url HTTP or tg:// URL to open. If the link is of the type internalLinkTypeWebApp, then the button must be marked as a Web App button
 inlineKeyboardButtonTypeUrl url:string = InlineKeyboardButtonType;
 
 //@description A button that opens a specified URL and automatically authorize the current user by calling getLoginUrlInfo @url An HTTP URL to pass to getLoginUrlInfo @id Unique button identifier @forward_text If non-empty, new text of the button in forwarded messages