diff --git a/stdlib/zipfile.pyi b/stdlib/zipfile.pyi
index 6e632fbe6..1f7493c9c 100644
--- a/stdlib/zipfile.pyi
+++ b/stdlib/zipfile.pyi
@@ -223,7 +223,7 @@ class ZipInfo:
     def FileHeader(self, zip64: bool | None = None) -> bytes: ...
 
 class _PathOpenProtocol(Protocol):
-    def __call__(self, mode: _ReadWriteMode = ..., pwd: bytes | None = ..., *, force_zip64: bool = ...) -> IO[bytes]: ...
+    def __call__(self, mode: _ReadWriteMode = "r", pwd: bytes | None = ..., *, force_zip64: bool = ...) -> IO[bytes]: ...
 
 if sys.version_info >= (3, 8):
     class Path:
@@ -245,7 +245,12 @@ if sys.version_info >= (3, 8):
         def __init__(self, root: ZipFile | StrPath | IO[bytes], at: str = "") -> None: ...
         if sys.version_info >= (3, 9):
             def open(
-                self, mode: _ReadWriteBinaryMode = "r", *args: Any, pwd: bytes | None = None, **kwargs: Any
+                self,
+                mode: _ReadWriteBinaryMode = "r",
+                encoding: str | None = None,
+                *args: Any,
+                pwd: bytes | None = None,
+                **kwargs: Any,
             ) -> IO[bytes]: ...
         else:
             @property