diff --git a/make_post_sell/lib/karaoke.py b/make_post_sell/lib/karaoke.py
index 80f36e6..48702de 100644
--- a/make_post_sell/lib/karaoke.py
+++ b/make_post_sell/lib/karaoke.py
@@ -232,7 +232,11 @@ def backfill_karaoke_async(shop_id, session_factory, app_settings):
                             )
                             if sizes:
                                 return product_id, title, file_key, ext, media_type, sizes
-                        except Exception:
+                        except Exception as exc:
+                            # Don't retry if the source file doesn't exist in S3
+                            if "NoSuchKey" in str(type(exc).__name__) or "NoSuchKey" in str(exc):
+                                log.warning("  SKIP %s (%s) — source file not in S3", title, file_key)
+                                return product_id, title, file_key, ext, media_type, None
                             log.exception("Backfill attempt %d failed for %s", attempt + 1, title)
 
                         if attempt < MAX_RETRIES - 1: