diff --git a/src/reverseproxy.js b/src/reverseproxy.js
index e5fcd8d1f..e2bac7f5d 100644
--- a/src/reverseproxy.js
+++ b/src/reverseproxy.js
@@ -249,7 +249,7 @@ function restoreFallbackCertificates(callback) {
 
         result.forEach(function (domain) {
             if (!safe.fs.writeFileSync(path.join(paths.NGINX_CERT_DIR, `${domain.domain}.host.cert`), domain.fallbackCertificate.cert)) return callback(new BoxError(BoxError.FS_ERROR, safe.error.message));
-            if (!safe.fs.writeFileSync(path.join(paths.NGINX_CERT_DIR, `${domain.domain}.host.key`), domains.fallbackCertificate.key)) return callback(new BoxError(BoxError.FS_ERROR, safe.error.message));
+            if (!safe.fs.writeFileSync(path.join(paths.NGINX_CERT_DIR, `${domain.domain}.host.key`), domain.fallbackCertificate.key)) return callback(new BoxError(BoxError.FS_ERROR, safe.error.message));
         });
 
         callback(null);