--- a/browser/base/content/aboutNetError.xhtml
+++ b/browser/base/content/aboutNetError.xhtml
@@ -250,17 +250,17 @@
 
         window.addEventListener("AboutNetErrorOptions", function(evt) {
         // Pinning errors are of type nssFailure2
           if (getErrorCode() == "nssFailure2") {
             document.getElementById("learnMoreContainer").style.display = "block";
             let learnMoreLink = document.getElementById("learnMoreLink");
             // nssFailure2 also gets us other non-overrideable errors. Choose
             // a "learn more" link based on description:
-            if (getDescription().includes("mozilla_pkix_error_key_pinning_failure")) {
+            if (getDescription().includes("MOZILLA_PKIX_ERROR_KEY_PINNING_FAILURE")) {
               learnMoreLink.href = "https://support.mozilla.org/kb/certificate-pinning-reports";
             }
 
             var options = JSON.parse(evt.detail);
             if (options && options.enabled) {
               var checkbox = document.getElementById("automaticallyReportInFuture");
               showCertificateErrorReporting();
               if (options.automatic) {