diff --git a/stdlib/3/builtins.pyi b/stdlib/3/builtins.pyi
index 541bc1588..b4ee85b2d 100644
--- a/stdlib/3/builtins.pyi
+++ b/stdlib/3/builtins.pyi
@@ -827,7 +827,14 @@ class UnicodeDecodeError(UnicodeError):
     reason = ... # type: str
     def __init__(self, __encoding: str, __object: bytes, __start: int, __end: int,
                  __reason: str) -> None: ...
-class UnicodeEncodeError(UnicodeError): ...
+class UnicodeEncodeError(UnicodeError):
+    encoding = ... # type: str
+    object = ... # type: str
+    start = ... # type: int
+    end = ... # type: int
+    reason = ... # type: str
+    def __init__(self, __encoding: str, __object: str, __start: int, __end: int,
+                 __reason: str) -> None: ...
 class UnicodeTranslateError(UnicodeError): ...
 class ZeroDivisionError(ArithmeticError): ...