diff --git a/stdlib/3/hashlib.pyi b/stdlib/3/hashlib.pyi
index 64ef70739c9d..695b6357fe5c 100644
--- a/stdlib/3/hashlib.pyi
+++ b/stdlib/3/hashlib.pyi
@@ -74,5 +74,5 @@ if sys.version_info >= (3, 6):
 
         def __init__(self, data: _DataType, digest_size: int = ..., key: _DataType = ..., salt: _DataType = ..., person: _DataType = ..., fanout: int = ..., depth: int = ..., leaf_size: int = ..., node_offset: int = ..., node_depth: int = ..., inner_size: int = ..., last_node: bool = ...) -> None: ...
 
-    blake2b = _BlakeHash
-    blake2s = _BlakeHash
+    def blake2b(data: _DataType = ..., digest_size: int = ..., key: _DataType = ..., salt: _DataType = ..., person: _DataType = ..., fanout: int = ..., depth: int = ..., leaf_size: int = ..., node_offset: int = ..., node_depth: int = ..., inner_size: int = ..., last_node: bool = ...) -> _BlakeHash: ...
+    def blake2s(data: _DataType = ..., digest_size: int = ..., key: _DataType = ..., salt: _DataType = ..., person: _DataType = ..., fanout: int = ..., depth: int = ..., leaf_size: int = ..., node_offset: int = ..., node_depth: int = ..., inner_size: int = ..., last_node: bool = ...) -> _BlakeHash: ...