diff --git a/stdlib/2/__builtin__.pyi b/stdlib/2/__builtin__.pyi
index f9e61af2b..0df170be1 100644
--- a/stdlib/2/__builtin__.pyi
+++ b/stdlib/2/__builtin__.pyi
@@ -224,7 +224,7 @@ class float:
     def hex(self) -> str: ...
     def is_integer(self) -> bool: ...
     @classmethod
-    def fromhex(cls, s: str) -> float: ...
+    def fromhex(cls, __s: str) -> float: ...
 
     @property
     def real(self) -> float: ...
@@ -616,7 +616,7 @@ if sys.version_info >= (3,):
         def upper(self) -> bytes: ...
         def zfill(self, __width: int) -> bytes: ...
         @classmethod
-        def fromhex(cls, s: str) -> bytes: ...
+        def fromhex(cls, __s: str) -> bytes: ...
         @classmethod
         def maketrans(cls, frm: bytes, to: bytes) -> bytes: ...
 
@@ -736,8 +736,8 @@ class bytearray(MutableSequence[int], ByteString):
         def translate(self, __table: str) -> bytearray: ...
     def upper(self) -> bytearray: ...
     def zfill(self, __width: int) -> bytearray: ...
-    @staticmethod
-    def fromhex(__string: str) -> bytearray: ...
+    @classmethod
+    def fromhex(cls, __string: str) -> bytearray: ...
     if sys.version_info >= (3,):
         @classmethod
         def maketrans(cls, __frm: bytes, __to: bytes) -> bytes: ...
diff --git a/stdlib/2and3/builtins.pyi b/stdlib/2and3/builtins.pyi
index f9e61af2b..0df170be1 100644
--- a/stdlib/2and3/builtins.pyi
+++ b/stdlib/2and3/builtins.pyi
@@ -224,7 +224,7 @@ class float:
     def hex(self) -> str: ...
     def is_integer(self) -> bool: ...
     @classmethod
-    def fromhex(cls, s: str) -> float: ...
+    def fromhex(cls, __s: str) -> float: ...
 
     @property
     def real(self) -> float: ...
@@ -616,7 +616,7 @@ if sys.version_info >= (3,):
         def upper(self) -> bytes: ...
         def zfill(self, __width: int) -> bytes: ...
         @classmethod
-        def fromhex(cls, s: str) -> bytes: ...
+        def fromhex(cls, __s: str) -> bytes: ...
         @classmethod
         def maketrans(cls, frm: bytes, to: bytes) -> bytes: ...
 
@@ -736,8 +736,8 @@ class bytearray(MutableSequence[int], ByteString):
         def translate(self, __table: str) -> bytearray: ...
     def upper(self) -> bytearray: ...
     def zfill(self, __width: int) -> bytearray: ...
-    @staticmethod
-    def fromhex(__string: str) -> bytearray: ...
+    @classmethod
+    def fromhex(cls, __string: str) -> bytearray: ...
     if sys.version_info >= (3,):
         @classmethod
         def maketrans(cls, __frm: bytes, __to: bytes) -> bytes: ...