diff --git a/features/permalinks.feature b/features/permalinks.feature
index f63aaf81..67dfbb47 100644
--- a/features/permalinks.feature
+++ b/features/permalinks.feature
@@ -83,3 +83,13 @@ Feature: Fancy permalinks
     Then the _site directory should exist
     And the _site/custom/posts directory should exist
     And I should see "bla bla" in "_site/custom/posts/some.html"
+
+  Scenario: Use per-post ending in .htm
+    Given I have a _posts directory
+    And I have the following post:
+      | title     | date       | permalink               | content |
+      | Some post | 2013-04-14 | /custom/posts/some.htm  | bla bla |
+    When I run jekyll build
+    Then the _site directory should exist
+    And the _site/custom/posts directory should exist
+    And I should see "bla bla" in "_site/custom/posts/some.htm"