diff --git a/lib/utils.js b/lib/utils.js
index 4f21e7ef1e3..8a6eb998f59 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -96,8 +96,8 @@ function acceptParams (str) {
     var splitIndex = str.indexOf('=', index);
     if (splitIndex === -1) break;
 
-    var colonIndex = str.indexOf(';', index);
-    var endIndex = colonIndex === -1 ? length : colonIndex;
+    var nextColonIndex = str.indexOf(';', index);
+    var endIndex = nextColonIndex === -1 ? length : colonIndex;
 
     if (splitIndex > endIndex) {
       index = str.lastIndexOf(';', splitIndex - 1) + 1;