diff --git a/stdlib/3/builtins.pyi b/stdlib/3/builtins.pyi
index 5264f22c4..3cd9da463 100644
--- a/stdlib/3/builtins.pyi
+++ b/stdlib/3/builtins.pyi
@@ -287,7 +287,7 @@ class str(Sequence[str]):
     def __add__(self, s: str) -> str: ...
     def __mul__(self, n: int) -> str: ...
     def __rmul__(self, n: int) -> str: ...
-    def __mod__(self, *args: Any) -> str: ...
+    def __mod__(self, value: Any) -> str: ...
     def __eq__(self, x: object) -> bool: ...
     def __ne__(self, x: object) -> bool: ...
     def __lt__(self, x: str) -> bool: ...
@@ -388,6 +388,8 @@ class bytes(ByteString):
     def __add__(self, s: bytes) -> bytes: ...
     def __mul__(self, n: int) -> bytes: ...
     def __rmul__(self, n: int) -> bytes: ...
+    if sys.version_info >= (3, 5):
+        def __mod__(self, value: Any) -> bytes: ...
     def __contains__(self, o: object) -> bool: ...
     def __eq__(self, x: object) -> bool: ...
     def __ne__(self, x: object) -> bool: ...
@@ -485,6 +487,8 @@ class bytearray(MutableSequence[int], ByteString):
     def __mul__(self, n: int) -> bytearray: ...
     def __rmul__(self, n: int) -> bytearray: ...
     def __imul__(self, n: int) -> bytearray: ...
+    if sys.version_info >= (3, 5):
+        def __mod__(self, value: Any) -> bytes: ...
     def __contains__(self, o: object) -> bool: ...
     def __eq__(self, x: object) -> bool: ...
     def __ne__(self, x: object) -> bool: ...