diff --git a/stdlib/_socket.pyi b/stdlib/_socket.pyi
index d7d7f73ea..e0a3f8507 100644
--- a/stdlib/_socket.pyi
+++ b/stdlib/_socket.pyi
@@ -356,6 +356,9 @@ if sys.platform == "linux" and sys.version_info >= (3, 9):
 
     J1939_FILTER_MAX: int
 
+if sys.platform == "linux" and sys.version_info >= (3, 10):
+    IPPROTO_MPTCP: int
+
 if sys.platform == "linux":
     AF_PACKET: int
     PF_PACKET: int
diff --git a/stdlib/socket.pyi b/stdlib/socket.pyi
index 430fef4ff..01d378deb 100644
--- a/stdlib/socket.pyi
+++ b/stdlib/socket.pyi
@@ -366,6 +366,8 @@ if sys.platform == "linux" and sys.version_info >= (3, 9):
         SO_J1939_PROMISC as SO_J1939_PROMISC,
         SO_J1939_SEND_PRIO as SO_J1939_SEND_PRIO,
     )
+if sys.platform == "linux" and sys.version_info >= (3, 10):
+    from _socket import IPPROTO_MPTCP as IPPROTO_MPTCP
 if sys.platform == "win32":
     from _socket import (
         RCVALL_IPLEVEL as RCVALL_IPLEVEL,