diff --git a/stdlib/http/cookies.pyi b/stdlib/http/cookies.pyi
index 682884423448..5434f8b8db7d 100644
--- a/stdlib/http/cookies.pyi
+++ b/stdlib/http/cookies.pyi
@@ -28,6 +28,7 @@ class Morsel(dict[str, Any], Generic[_T]):
     @property
     def key(self) -> str | MaybeNone: ...
     def __init__(self) -> None: ...
+    def copy(self) -> Morsel[_T]: ...
     def set(self, key: str, val: str, coded_val: _T) -> None: ...
     def setdefault(self, key: str, val: str | None = None) -> str: ...
     # The dict update can also get a keywords argument so this is incompatible