diff --git a/lib/gitlab/ci/pipeline_duration.rb b/lib/gitlab/ci/pipeline_duration.rb
index b9d0006182ef74778247523072cb820a90a9cc2d..03bf7fabc993de1e3cdc3bee1a3de67c0b75e892 100644
--- a/lib/gitlab/ci/pipeline_duration.rb
+++ b/lib/gitlab/ci/pipeline_duration.rb
@@ -12,7 +12,7 @@ module Gitlab
         now = Time.now
 
         segments = builds.map do |b|
-          Segment.new(b.started_at, b.finished_at || now)
+          Segment.new(b.started_at || now, b.finished_at || now)
         end
 
         new(segments)