diff --git a/src/lib/create/from-string.js b/src/lib/create/from-string.js
index 5c4d11f740..58739b9d7c 100644
--- a/src/lib/create/from-string.js
+++ b/src/lib/create/from-string.js
@@ -151,7 +151,7 @@ function untruncateYear(yearStr) {
 function preprocessRFC2822(s) {
     // Remove comments and folding whitespace and replace multiple-spaces with a single space
     return s
-        .replace(/\([^)]*\)|[\n\t]/g, ' ')
+        .replace(/\([^()]*\)|[\n\t]/g, ' ')
         .replace(/(\s\s+)/g, ' ')
         .replace(/^\s\s*/, '')
         .replace(/\s\s*$/, '');