diff --git a/setup.cfg b/setup.cfg
index 80536bf1..7e93847d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -91,6 +91,7 @@ python =
 deps =
   coverage
   pytest
+  pytest-mypy-plugins; python_version >= "3.9"
 install_command =
   python -m pip install --no-binary coverage {opts} {packages}
 commands =
diff --git a/src/wrapt/__init__.pyi b/src/wrapt/__init__.pyi
new file mode 100644
index 00000000..0014104f
--- /dev/null
+++ b/src/wrapt/__init__.pyi
@@ -0,0 +1,5 @@
+from typing import Callable, TypeVar
+
+F = TypeVar("F", bound=Callable)
+
+def FunctionWrapper(wrapped: F, wrapper: Callable) -> F: ...
diff --git a/src/wrapt/py.typed b/src/wrapt/py.typed
new file mode 100644
index 00000000..b648ac92
--- /dev/null
+++ b/src/wrapt/py.typed
@@ -0,0 +1 @@
+partial
diff --git a/tests/test_mypy.yml b/tests/test_mypy.yml
new file mode 100644
index 00000000..9dc5dba4
--- /dev/null
+++ b/tests/test_mypy.yml
@@ -0,0 +1,18 @@
+- case: function_wrapper
+  main: |
+    from wrapt import FunctionWrapper
+
+    def x(a: bool, b: str) -> int:
+        return 1
+
+    def wrapper(*args, **kwargs):
+        pass
+
+    x = FunctionWrapper(x, wrapper)
+    reveal_type(x)
+
+    x(1, None)
+  out: |
+    main:10: note: Revealed type is "def (a: builtins.bool, b: builtins.str) -> builtins.int"
+    main:12: error: Argument 1 to "x" has incompatible type "int"; expected "bool"  [arg-type]
+    main:12: error: Argument 2 to "x" has incompatible type "None"; expected "str"  [arg-type]