diff --git a/youtube_dl/extractor/npo.py b/youtube_dl/extractor/npo.py
index 545e585099e..4dbab16ab47 100644
--- a/youtube_dl/extractor/npo.py
+++ b/youtube_dl/extractor/npo.py
@@ -44,8 +44,8 @@ def _get_token(self, video_id):
             note='Downloading token')['token']
 
     def _real_extract(self, url):
-            # Remove /afspelen and/or any trailing `/`s
-            url = re.sub(r'/(?:afspelen)?/*$', '', url)
+        # Remove /afspelen and/or any trailing `/`s
+        url = re.sub(r'/(?:afspelen)?/*$', '', url)
         slug = url.split('/')[-1]
 
         program_metadata = self._download_json('https://npo.nl/start/api/domain/program-detail',