diff --git a/lib/rules.js b/lib/rules.js
index 33491eb2..6f9888b7 100644
--- a/lib/rules.js
+++ b/lib/rules.js
@@ -353,7 +353,7 @@ module.exports = [
     "regexp": trailingSpaceRe,
     "func": function MD009(params, errors) {
       var brSpaces = params.options.br_spaces || 0;
-      params.lines.forEach(function forLine(line, lineIndex) {
+      forEachLine(params, function forLine(line, lineIndex) {
         if (trailingSpaceRe.test(line)) {
           var expected = (brSpaces < 2) ? 0 : brSpaces;
           errors.addDetailIf(lineIndex + 1,