diff --git a/yt_dlp/utils/_utils.py b/yt_dlp/utils/_utils.py
index 13e8d149e9..1de901b1b7 100644
--- a/yt_dlp/utils/_utils.py
+++ b/yt_dlp/utils/_utils.py
@@ -168,7 +168,7 @@ def IDENTITY(x):
 NUMBER_RE = r'\d+(?:\.\d+)?'
 
 WINDOWS_RESERVED_NAMES_RE = fr'({'|'.join(
-    ("CON", "PRN", "AUX", "CLOCK$", "NUL")
+    ("CON", "CONOUT$", "CONIN$", "PRN", "AUX", "CLOCK$", "NUL")
     + tuple(f"{name:s}{num:d}" for name, num in itertools.product(("COM", "LPT"), range(0, 10)))
     + tuple(
         f"{name:s}{ssd:s}"