diff --git a/slate/slate.py b/slate/slate.py
index 4123b68..3657ccd 100644
--- a/slate/slate.py
+++ b/slate/slate.py
@@ -146,7 +146,7 @@ class Slate():
         reps_for_job = [[]] * num_jobs
         for i in range(reps):
             reps_for_job[i % num_jobs].append(i)
-        return reps_for_job[job_id]
+        return reps_for_job[job_id-1]
 
     def run_local(self, filename, name, job_id):
         config = self.load_config(filename, name)