1 files changed, 1 insertions, 1 deletions
diff --git a/lib/rss/rss.rb b/lib/rss/rss.rb
index 4f6732b4d2..224b576154 100644
--- a/lib/rss/rss.rb
+++ b/lib/rss/rss.rb
@@ -53,7 +53,7 @@ class Time
       if usec.zero?
         fraction_digits = 0
       else
-        fraction_digits = Math.log10(usec.to_s.sub(/0*$/, '').to_i).floor + 1
+        fraction_digits = strftime('%6N').sub!(/0*\z/, '').size
       end
       xmlschema(fraction_digits)
     end