diff --git a/stdlib/3/sys.pyi b/stdlib/3/sys.pyi
index d7c9176d6..dde62de37 100644
--- a/stdlib/3/sys.pyi
+++ b/stdlib/3/sys.pyi
@@ -160,6 +160,7 @@ if sys.platform != "win32":
     def getdlopenflags() -> int: ...
 
 def getfilesystemencoding() -> str: ...
+def getfilesystemencodeerrors() -> str: ...
 def getrefcount(__object: Any) -> int: ...
 def getrecursionlimit() -> int: ...
 @overload