diff --git a/core/misc/ajax.es6.js b/core/misc/ajax.es6.js
index d3de666e60c9d74c9ed4ab2592fb18f8d411eb8b..a438fbc60c7e8314a1a637f66d05d73a0e40b35a 100644
--- a/core/misc/ajax.es6.js
+++ b/core/misc/ajax.es6.js
@@ -430,7 +430,7 @@
      *
      * @type {string}
      */
-    this.url = this.url.replace(/\/nojs(\/|$|\?|#)/g, '/ajax$1');
+    this.url = this.url.replace(/\/nojs(\/|$|\?|#)/, '/ajax$1');
     // If the 'nojs' version of the URL is trusted, also trust the 'ajax'
     // version.
     if (drupalSettings.ajaxTrustedUrl[originalUrl]) {
diff --git a/core/misc/ajax.js b/core/misc/ajax.js
index 74b42051aae09ed7a9df5728cf4bf4a1cd83bf42..814d82f8f2348f85aeda9c2c1faa8adce5062859 100644
--- a/core/misc/ajax.js
+++ b/core/misc/ajax.js
@@ -189,7 +189,7 @@ function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr
 
     var originalUrl = this.url;
 
-    this.url = this.url.replace(/\/nojs(\/|$|\?|#)/g, '/ajax$1');
+    this.url = this.url.replace(/\/nojs(\/|$|\?|#)/, '/ajax$1');
 
     if (drupalSettings.ajaxTrustedUrl[originalUrl]) {
       drupalSettings.ajaxTrustedUrl[this.url] = true;