diff --git a/stdlib/asyncio/constants.pyi b/stdlib/asyncio/constants.pyi
index 2010fe912..230cf4faf 100644
--- a/stdlib/asyncio/constants.pyi
+++ b/stdlib/asyncio/constants.pyi
@@ -1,12 +1,13 @@
 import enum
 import sys
+from typing_extensions import Literal
 
-LOG_THRESHOLD_FOR_CONNLOST_WRITES: int
-ACCEPT_RETRY_DELAY: int
-DEBUG_STACK_DEPTH: int
+LOG_THRESHOLD_FOR_CONNLOST_WRITES: Literal[5]
+ACCEPT_RETRY_DELAY: Literal[1]
+DEBUG_STACK_DEPTH: Literal[10]
 if sys.version_info >= (3, 7):
     SSL_HANDSHAKE_TIMEOUT: float
-    SENDFILE_FALLBACK_READBUFFER_SIZE: int
+    SENDFILE_FALLBACK_READBUFFER_SIZE: Literal[262144]
 
 class _SendfileMode(enum.Enum):
     UNSUPPORTED: int