diff --git a/src/ajax.js b/src/ajax.js
index c93aa946a55..19dc1b3869f 100644
--- a/src/ajax.js
+++ b/src/ajax.js
@@ -71,6 +71,9 @@ export function ajaxBuilder(timeout = 3000) {
             }
           }
         };
+        x.ontimeout = function () {
+          utils.logError('  xhr timeout after ', x.timeout, 'ms');
+        };
       }
 
       if (method === 'GET' && data) {