diff --git a/encode.py b/encode.py
index 75933a9..5889988 100755
--- a/encode.py
+++ b/encode.py
@@ -128,7 +128,7 @@ def encode(xml, force=False, prefix='.'):
         shutil.move(mp4_480p, public_mp4_480p)
         cmd = [
             './subtitles.py',
-            '--prefix', prefix
+            '--prefix', prefix,
             item_json
         ]
         subprocess.call(cmd)