diff --git a/main.go b/main.go
index 5c8702f..e3542b5 100644
--- a/main.go
+++ b/main.go
@@ -181,10 +181,14 @@ func main() {
 			log.Printf("%d jobs for workflow run: %d", len(workflowJobs), run.GetID())
 			for _, job := range workflowJobs {
 
-				dur := job.GetCompletedAt().Time.Sub(job.GetStartedAt().Time)
-				allUsage += dur
-				log.Printf("Job: %d [%s - %s] (%s): %s",
-					job.GetID(), job.GetStartedAt().Format("2006-01-02 15:04:05"), job.GetCompletedAt().Format("2006-01-02 15:04:05"), humanDuration(dur), job.GetConclusion())
+				if !job.GetCompletedAt().IsZero() {
+					dur := job.GetCompletedAt().Time.Sub(job.GetStartedAt().Time)
+					allUsage += dur
+					log.Printf("Job: %d [%s - %s] (%s): %s",
+						job.GetID(), job.GetStartedAt().Format("2006-01-02 15:04:05"),
+						job.GetCompletedAt().Format("2006-01-02 15:04:05"),
+						humanDuration(dur), job.GetConclusion())
+				}
 			}
 		}
 	}