diff --git a/mvs_job.py b/mvs_job.py
index 5b845e4..0add200 100755
--- a/mvs_job.py
+++ b/mvs_job.py
@@ -80,7 +80,7 @@ def upload_source(local_file, dataset_name, member_name, mvshost=MVSHOST):
 
 def submit_jcl(job, mvshost="oldcomputernerd.com"):
     """Submit JCL job from local directory"""
-    subjcl = os.path.join(JCLLIB, f"{job}.jcl")
+    subjcl = os.path.join(JCLLIB, f"{job.upper()}.jcl")
 
     if not os.path.exists(subjcl):
         print(f"JCL file {subjcl} not found")