diff --git a/yt_dlp/networking/_requests.py b/yt_dlp/networking/_requests.py
index 7af7d475d..6068e1865 100644
--- a/yt_dlp/networking/_requests.py
+++ b/yt_dlp/networking/_requests.py
@@ -317,6 +317,8 @@ def _send(self, request):
 
         headers = self._merge_headers(request.headers)
         add_accept_encoding_header(headers, SUPPORTED_ENCODINGS)
+        if request.extensions.get('keep_header_casing'):
+            headers = headers.sensitive()
 
         max_redirects_exceeded = False
 
@@ -325,9 +327,6 @@ def _send(self, request):
             legacy_ssl_support=request.extensions.get('legacy_ssl'),
         )
 
-        if request.extensions.get('keep_header_casing'):
-            headers = headers.sensitive()
-
         try:
             requests_res = session.request(
                 method=request.method,