diff --git a/src/certificates.js b/src/certificates.js
index 50a39fdf9..d7da84b01 100644
--- a/src/certificates.js
+++ b/src/certificates.js
@@ -20,7 +20,7 @@ var acme = require('./cert/acme.js'),
 exports = module.exports = {
     installAdminCertificate: installAdminCertificate,
     autoRenew: autoRenew,
-    setAppCertificate: setAppCertificate,
+    setFallbackCertificate: setFallbackCertificate,
     setAdminCertificate: setAdminCertificate,
     CertificatesError: CertificatesError,
     validateCertificate: validateCertificate,
@@ -107,7 +107,7 @@ function validateCertificate(cert, key, fqdn) {
     return null;
 }
 
-function setAppCertificate(cert, key, callback) {
+function setFallbackCertificate(cert, key, callback) {
     assert.strictEqual(typeof cert, 'string');
     assert.strictEqual(typeof key, 'string');
     assert.strictEqual(typeof callback, 'function');
diff --git a/src/routes/settings.js b/src/routes/settings.js
index 510bea59a..931a3c50f 100644
--- a/src/routes/settings.js
+++ b/src/routes/settings.js
@@ -144,7 +144,7 @@ function setCertificate(req, res, next) {
     if (!req.body.cert || typeof req.body.cert !== 'string') return next(new HttpError(400, 'cert must be a string'));
     if (!req.body.key || typeof req.body.key !== 'string') return next(new HttpError(400, 'key must be a string'));
 
-    certificates.setAppCertificate(req.body.cert, req.body.key, function (error) {
+    certificates.setFallbackCertificate(req.body.cert, req.body.key, function (error) {
         if (error && error.reason === CertificatesError.INVALID_CERT) return next(new HttpError(400, error.message));
         if (error) return next(new HttpError(500, error));