diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 9c5ac59ad..10f23b3a0 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -103,9 +103,10 @@ module ApplicationHelper
   end
 
   def duration_to_hhmmss(seconds)
+    seconds = seconds.round
     hh = seconds.div(1.hour).to_s
     mm = seconds.div(1.minute).to_s
-    ss = "%.2d" % (seconds.round % 1.minute)
+    ss = "%.2d" % (seconds % 1.minute)
 
     if seconds >= 1.hour
       "#{hh}:#{mm}:#{ss}"