diff --git a/uni_modules/mp-html/components/mp-html/parser.js b/uni_modules/mp-html/components/mp-html/parser.js
index 574f6b7..c0c9fa2 100644
--- a/uni_modules/mp-html/components/mp-html/parser.js
+++ b/uni_modules/mp-html/components/mp-html/parser.js
@@ -122,7 +122,7 @@ function makeMap (str) {
  * @param {Boolean} amp 要不要解码 &
  * @returns {String} 解码后的字符串
  */
-function decodeEntity (str, amp) {
+function decodeEntity (str, amp = true) {
   let i = str.indexOf('&')
   while (i !== -1) {
     const j = str.indexOf(';', i + 3)