diff --git a/opter.js b/opter.js
index bc83b21..1374678 100644
--- a/opter.js
+++ b/opter.js
@@ -96,7 +96,7 @@ module.exports = class Opts {
     if (name in this.opts) return true;
     if (name in this.synonyms) {
       const syns = this.synonyms[name];
-      const hits = syns.filter(s => s in this.opts ).length;
+      const hits = syns.filter(s => s in this.opts).length;
       if (hits > 0) { return true; }
     }
     return false;