diff --git a/bricks/jsoncall.js b/bricks/jsoncall.js
index 8875c29..191a6ec 100755
--- a/bricks/jsoncall.js
+++ b/bricks/jsoncall.js
@@ -57,7 +57,7 @@ bricks.HttpText = class {
 			"_webbricks_":1,
 			"width":width,
 			"height":height,
-			"_is_mobile":bricks.is_mobile()
+			"_is_mobile":is_mobile
 		}
 	}
 	url_parse(url){