diff --git a/stdlib/@tests/test_cases/check_codecs.py b/stdlib/@tests/test_cases/check_codecs.py
index 19e663ceeaaf..76411fa6dc50 100644
--- a/stdlib/@tests/test_cases/check_codecs.py
+++ b/stdlib/@tests/test_cases/check_codecs.py
@@ -7,6 +7,7 @@
 assert_type(codecs.decode(b"x", "unicode-escape"), str)
 
 assert_type(codecs.decode(b"x", "utf-8"), str)
+assert_type(codecs.lookup("UTF-8").decode(b"potato", errors="replace"), tuple[str, int])
 codecs.decode("x", "utf-8")  # type: ignore
 
 assert_type(codecs.decode("ab", "hex"), bytes)
diff --git a/stdlib/codecs.pyi b/stdlib/codecs.pyi
index ee1ab25bac47..94a1fdd25577 100644
--- a/stdlib/codecs.pyi
+++ b/stdlib/codecs.pyi
@@ -101,7 +101,7 @@ class _Encoder(Protocol):
 
 @type_check_only
 class _Decoder(Protocol):
-    def __call__(self, input: ReadableBuffer, errors: str = ..., /) -> tuple[str, int]: ...  # signature of Codec().decode
+    def __call__(self, input: ReadableBuffer, /, errors: str = ...) -> tuple[str, int]: ...  # signature of Codec().decode
 
 @type_check_only
 class _StreamReader(Protocol):