diff --git a/lib/less/browser.js b/lib/less/browser.js
index 5ac2b93d..44c36974 100644
--- a/lib/less/browser.js
+++ b/lib/less/browser.js
@@ -163,7 +163,7 @@ function loadStyleSheet(sheet, callback, reload, remaining) {
                 contents[href] = data;  // Updating top importing parser content cache
                 new(less.Parser)({
                     optimization: less.optimization,
-                    paths: [href.replace(/[\w\.-]+$/, '')],
+                    paths: [href.replace(/[\w\.%-]+$/, '')],
                     mime: sheet.type,
                     filename: href,
                     'contents': contents,    // Passing top importing parser content cache ref down.