diff --git a/setup.py b/setup.py
index 374839c..d845a13 100644
--- a/setup.py
+++ b/setup.py
@@ -19,6 +19,7 @@
         "async",
         "trio",
         "asyncio",
+        "twisted",
     ],
     python_requires=">=3.7",
     tests_require=['curio'],
@@ -27,6 +28,7 @@
         "License :: OSI Approved :: Apache Software License",
         "Framework :: Trio",
         "Framework :: AsyncIO",
+        "Framework :: Twisted",
         "Operating System :: POSIX :: Linux",
         "Operating System :: MacOS :: MacOS X",
         "Operating System :: Microsoft :: Windows",
diff --git a/sniffio/_impl.py b/sniffio/_impl.py
index c1a7bbf..0ba46a9 100644
--- a/sniffio/_impl.py
+++ b/sniffio/_impl.py
@@ -35,6 +35,8 @@ def current_async_library() -> str:
     **asyncio**                      ``"asyncio"``
     **Trio-asyncio**    v0.8.2+     ``"trio"`` or ``"asyncio"``,
                                     depending on current mode
+    **Twisted**         v?+          ``"twisted"`` or ``"asyncio"``,
+                                    depending on current mode
     ================   ===========  ============================
 
     Returns: