diff --git a/src/packaging/tags.py b/src/packaging/tags.py
index dc0bbb6d..89f19261 100644
--- a/src/packaging/tags.py
+++ b/src/packaging/tags.py
@@ -164,7 +164,7 @@ def _cpython_abis(py_version: PythonVersion, warn: bool = False) -> List[str]:
     has_ext = "_d.pyd" in EXTENSION_SUFFIXES
     if with_debug or (with_debug is None and (has_refcount or has_ext)):
         debug = "d"
-    if py_version >= (3, 13) and _get_config_var("Py_NOGIL", warn):
+    if py_version >= (3, 13) and _get_config_var("Py_GIL_DISABLED", warn):
         threading = "t"
     if py_version < (3, 8):
         with_pymalloc = _get_config_var("WITH_PYMALLOC", warn)
diff --git a/tests/test_tags.py b/tests/test_tags.py
index e7f1c583..9821fc25 100644
--- a/tests/test_tags.py
+++ b/tests/test_tags.py
@@ -907,7 +907,7 @@ def test__generic_abi_disable_gil(self, monkeypatch):
             "Py_DEBUG": False,
             "EXT_SUFFIX": ".cpython-313t-x86_64-linux-gnu.so",
             "WITH_PYMALLOC": 0,
-            "Py_NOGIL": 1,
+            "Py_GIL_DISABLED": 1,
         }
         monkeypatch.setattr(sysconfig, "get_config_var", config.__getitem__)
         assert tags._generic_abi() == ["cp313t"]
@@ -941,7 +941,7 @@ def test__generic_abi_old_windows(self, monkeypatch):
             "EXT_SUFFIX": ".pyd",
             "Py_DEBUG": 0,
             "WITH_PYMALLOC": 0,
-            "Py_NOGIL": 0,
+            "Py_GIL_DISABLED": 0,
         }
         monkeypatch.setattr(sysconfig, "get_config_var", config.__getitem__)
         assert tags._generic_abi() == tags._cpython_abis(sys.version_info[:2])