diff --git a/lib/sourcemaps.js b/lib/sourcemaps.js
index feab7ab..8be808d 100644
--- a/lib/sourcemaps.js
+++ b/lib/sourcemaps.js
@@ -6,8 +6,9 @@ function getParentDetails(js, files) {
   return files
     .filter((f) => f.type === 'html')
     .filter((h)  => {
-      return h.includes && h.includes.indexOf(source) >= 0
-          || h.href === source;
+      // remove absolute ^/ since file names come without it
+      const includes = (h.includes || []).map((i) => i.replace(/^\//, ''));
+      return includes.indexOf(source) >= 0 || h.name === source;
     }).map((h) => {
       // line and col on source mapp offset are based
       // on the minified/final file, not the original