diff --git a/lib/yearlyarchive.rb b/lib/yearlyarchive.rb
index 2e6cf861..0d8f444d 100644
--- a/lib/yearlyarchive.rb
+++ b/lib/yearlyarchive.rb
@@ -10,7 +10,7 @@ def generate_yearly_archive(articles, date_attribute, basepath, title, templaten
   yearlist = yearmap.keys.sort
   yearlist.each_index { |i|
     year = yearlist[i]
-    yearmap[year].sort! { |a,b| b[date_attribute] <=> a[date_attribute] }
+    yearmap[year].sort! { |a,b| b[date_attribute].to_datetime <=> a[date_attribute].to_datetime }
     pastfuture = yearmap[year].partition { |a| a[date_attribute].to_datetime > today.to_datetime }
     linkprev = if (i>0)
       ", :linkprev => OpenStruct.new(:title => '#{yearlist[i-1]}', :link => '#{basepath}/#{yearlist[i-1]}/')"