diff --git a/stdlib/@tests/stubtest_allowlists/linux-py313.txt b/stdlib/@tests/stubtest_allowlists/linux-py313.txt
index e81567635..e76c72d2c 100644
--- a/stdlib/@tests/stubtest_allowlists/linux-py313.txt
+++ b/stdlib/@tests/stubtest_allowlists/linux-py313.txt
@@ -1,3 +1,2 @@
 # TODO: triage these (new in py313)
-mmap.MAP_NORESERVE
 posixpath.splitroot
diff --git a/stdlib/mmap.pyi b/stdlib/mmap.pyi
index 7ebec003e..a0c150d6e 100644
--- a/stdlib/mmap.pyi
+++ b/stdlib/mmap.pyi
@@ -128,3 +128,6 @@ if sys.version_info >= (3, 13) and sys.platform == "darwin":
     MAP_TRANSLATED_ALLOW_EXECUTE: Final = 131072
     MAP_UNIX03: Final = 262144
     MAP_TPRO: Final = 524288
+
+if sys.version_info >= (3, 13) and sys.platform == "linux":
+    MAP_NORESERVE: Final = 16384