diff --git a/cli/cros/cros_lint.py b/cli/cros/cros_lint.py
index ea0f421..9ad27dc 100644
--- a/cli/cros/cros_lint.py
+++ b/cli/cros/cros_lint.py
@@ -361,6 +361,11 @@
                     'errors.  If the shellcheck findings are not useful, '
                     'please file a bug at:\n%s', bug_url)
     lint_result.returncode = 0
+
+  # Check whitespace.
+  if not _WhiteSpaceLintData(path, osutils.ReadFile(path)):
+    lint_result.returncode = 1
+
   return lint_result