diff --git a/lib/annotate/annotate_routes.rb b/lib/annotate/annotate_routes.rb
index ba1ba4bf8..b91f46417 100644
--- a/lib/annotate/annotate_routes.rb
+++ b/lib/annotate/annotate_routes.rb
@@ -65,9 +65,6 @@ def routes_file
     def rewrite_contents_with_header(existing_text, header, options = {})
       content, header_position = strip_annotations(existing_text)
       new_content = annotate_routes(header, content, header_position, options)
-
-      # Make sure we end on a trailing newline.
-      new_content << '' unless new_content.last == ''
       new_text = new_content.join("\n")
 
       if existing_text == new_text
@@ -195,6 +192,9 @@ def annotate_routes(header, content, header_position, options = {})
         new_content = magic_comments_map + content + header
       end
 
+      # Make sure we end on a trailing newline.
+      new_content << '' unless new_content.last == ''
+
       new_content
     end