diff --git a/lazy_player/thumbnailer.py b/lazy_player/thumbnailer.py
index a1b5e13..02ec949 100644
--- a/lazy_player/thumbnailer.py
+++ b/lazy_player/thumbnailer.py
@@ -50,8 +50,8 @@ class Thumbnailer(ThreadPoolExecutor):
         if file_item.attempted_thumbnail.value:
             return
 
-        self.submit(generate_thumbnail_sync_nicely, file_item)
         file_item.attempted_thumbnail.value = True
+        self.submit(generate_thumbnail_sync_nicely, file_item)
 
 
 def generate_thumbnail_sync_nicely(file_item: FileItem):