diff --git a/stdlib/http/server.pyi b/stdlib/http/server.pyi
index 22c33bc3787a..07cde553c1df 100644
--- a/stdlib/http/server.pyi
+++ b/stdlib/http/server.pyi
@@ -45,7 +45,7 @@ class BaseHTTPRequestHandler(socketserver.StreamRequestHandler):
     def log_error(self, format: str, *args: Any) -> None: ...
     def log_message(self, format: str, *args: Any) -> None: ...
     def version_string(self) -> str: ...
-    def date_time_string(self, timestamp: int | None = None) -> str: ...
+    def date_time_string(self, timestamp: float | None = None) -> str: ...
     def log_date_time_string(self) -> str: ...
     def address_string(self) -> str: ...
     def parse_request(self) -> bool: ...  # undocumented