diff --git a/stubs/twisted/internet/defer.pyi b/stubs/twisted/internet/defer.pyi
new file mode 100644
--- /dev/null
+++ b/stubs/twisted/internet/defer.pyi
@@ -0,0 +1,124 @@
+# Stubs for twisted.internet.defer (Python 3)
+#
+# NOTE: This dynamically typed stub was automatically generated by stubgen.
+
+from twisted.python import lockfile
+from typing import Any, Callable, Generic, Optional, TypeVar
+
+class AlreadyCalledError(Exception): ...
+class CancelledError(Exception): ...
+class TimeoutError(Exception): ...
+
+def succeed(result: Any): ...
+def fail(result: Optional[Any] = ...): ...
+def maybeDeferred(f: Any, *args: Any, **kw: Any): ...
+
+T = TypeVar('T')
+class Deferred(Generic[T]):
+    called: bool = ...
+    paused: bool = ...
+    debug: bool = ...
+    callbacks: Any = ...
+    def __init__(self, canceller: Optional[Any] = ...) -> None: ...
+    def addCallbacks(self,
+                     callback: Callable[[T], Any],
+                     errback: Optional[Any] = ...,
+                     callbackArgs: Optional[Any] = ...,
+                     callbackKeywords: Optional[Any] = ...,
+                     errbackArgs: Optional[Any] = ...,
+                     errbackKeywords: Optional[Any] = ...): ...
+    def addCallback(self, callback: Callable[[T], Any], *args: Any, **kw: Any): ...
+    def addErrback(self, errback: Any, *args: Any, **kw: Any): ...
+    def addBoth(self, callback: Callable[[T], Any], *args: Any, **kw: Any): ...
+    def addTimeout(self, timeout: Any, clock: Any, onTimeoutCancel: Optional[Any] = ...): ...
+    def chainDeferred(self, d: Any): ...
+    def callback(self, result: T) -> None: ...
+    def errback(self, fail: Optional[Any] = ...) -> None: ...
+    def pause(self) -> None: ...
+    def unpause(self) -> None: ...
+    def cancel(self) -> None: ...
+    def __iter__(self): ...
+    def send(self, value: Optional[Any] = ...): ...
+    __await__: Any = ...
+    __next__: Any = ...
+    def asFuture(self, loop: Any): ...
+    @classmethod
+    def fromFuture(cls, future: Any): ...
+
+def ensureDeferred(coro: Any): ...
+
+class DebugInfo:
+    failResult: Any = ...
+    def __del__(self) -> None: ...
+
+class FirstError(Exception):
+    subFailure: Any = ...
+    index: Any = ...
+    def __init__(self, failure: Any, index: Any) -> None: ...
+    def __cmp__(self, other: Any): ...
+
+class DeferredList(Deferred):
+    fireOnOneCallback: bool = ...
+    fireOnOneErrback: bool = ...
+    resultList: Any = ...
+    consumeErrors: Any = ...
+    finishedCount: int = ...
+    def __init__(self, deferredList: Any, fireOnOneCallback: bool = ..., fireOnOneErrback: bool = ..., consumeErrors: bool = ...) -> None: ...
+    def cancel(self) -> None: ...
+
+def gatherResults(deferredList: Any, consumeErrors: bool = ...): ...
+
+SUCCESS: bool
+FAILURE: bool
+
+class waitForDeferred:
+    d: Any = ...
+    def __init__(self, d: Any) -> None: ...
+    def getResult(self): ...
+
+def deferredGenerator(f: Any): ...
+
+class _DefGen_Return(BaseException):
+    value: Any = ...
+    def __init__(self, value: Any) -> None: ...
+
+def returnValue(val: Any) -> None: ...
+
+class _InternalInlineCallbacksCancelledError(Exception): ...
+
+def inlineCallbacks(f: Any): ...
+
+class _ConcurrencyPrimitive:
+    waiting: Any = ...
+    def __init__(self) -> None: ...
+    def run(*args: Any, **kwargs: Any): ...
+
+class DeferredLock(_ConcurrencyPrimitive):
+    locked: bool = ...
+    def acquire(self): ...
+    def release(self) -> None: ...
+
+class DeferredSemaphore(_ConcurrencyPrimitive):
+    tokens: Any = ...
+    limit: Any = ...
+    def __init__(self, tokens: Any) -> None: ...
+    def acquire(self): ...
+    def release(self) -> None: ...
+
+class QueueOverflow(Exception): ...
+class QueueUnderflow(Exception): ...
+
+class DeferredQueue:
+    waiting: Any = ...
+    pending: Any = ...
+    size: Any = ...
+    backlog: Any = ...
+    def __init__(self, size: Optional[Any] = ..., backlog: Optional[Any] = ...) -> None: ...
+    def put(self, obj: Any) -> None: ...
+    def get(self): ...
+
+class AlreadyTryingToLockError(Exception): ...
+
+class DeferredFilesystemLock(lockfile.FilesystemLock):
+    def __init__(self, name: Any, scheduler: Optional[Any] = ...) -> None: ...
+    def deferUntilLocked(self, timeout: Optional[Any] = ...): ...