diff --git a/src/types/function.rs b/src/types/function.rs
index 8b6c6ca984e..05a7c62a613 100644
--- a/src/types/function.rs
+++ b/src/types/function.rs
@@ -102,15 +102,15 @@ impl PyCFunction {
     ///         let i = args.extract::<(i64,)>()?.0;
     ///         Ok(i+1)
     ///     };
-    ///     let add_one = types::PyCFunction::new_closure(add_one, "add_one", "add one to integer", py).unwrap();
+    ///     let add_one = types::PyCFunction::new_closure(py, "add_one", "add one to integer", add_one).unwrap();
     ///     py_run!(py, add_one, "assert add_one(42) == 43");
     /// });
     /// ```
     pub fn new_closure<'a, F, R>(
-        f: F,
+        py: Python<'a>,
         name: &'static str,
         doc: &'static str,
-        py: Python<'a>,
+        f: F,
     ) -> PyResult<&'a PyCFunction>
     where
         F: Fn(&types::PyTuple, Option<&types::PyDict>) -> R + Send + 'static,
diff --git a/tests/test_pyfunction.rs b/tests/test_pyfunction.rs
index 62f640ffbc1..5b1dd52063a 100644
--- a/tests/test_pyfunction.rs
+++ b/tests/test_pyfunction.rs
@@ -418,7 +418,7 @@ fn test_closure() {
                 Ok(res)
             })
         };
-        let closure_py = PyCFunction::new_closure(f, "test_fn", "test_fn doc", py).unwrap();
+        let closure_py = PyCFunction::new_closure(py, "test_fn", "test_fn doc", f).unwrap();
 
         py_assert!(py, closure_py, "closure_py(42) == [43]");
         py_assert!(py, closure_py, "closure_py.__name__ == 'test_fn'");
@@ -442,7 +442,7 @@ fn test_closure_counter() {
                 Ok(*counter)
             };
         let counter_py =
-            PyCFunction::new_closure(counter_fn, "counter", "counter doc", py).unwrap();
+            PyCFunction::new_closure(py, "counter", "counter doc", counter_fn).unwrap();
 
         py_assert!(py, counter_py, "counter_py() == 1");
         py_assert!(py, counter_py, "counter_py() == 2");
diff --git a/tests/ui/invalid_closure.rs b/tests/ui/invalid_closure.rs
index bc04f7abbb4..d996e4c9f8f 100644
--- a/tests/ui/invalid_closure.rs
+++ b/tests/ui/invalid_closure.rs
@@ -10,7 +10,7 @@ fn main() {
             println!("This is five: {:?}", ref_.len());
             Ok(())
         };
-        PyCFunction::new_closure(closure_fn, "name", "doc", py).unwrap().into()
+        PyCFunction::new_closure(py, "name", "doc", closure_fn).unwrap().into()
     });
 
     Python::with_gil(|py| {
diff --git a/tests/ui/invalid_closure.stderr b/tests/ui/invalid_closure.stderr
index e51b75373b4..67354df5918 100644
--- a/tests/ui/invalid_closure.stderr
+++ b/tests/ui/invalid_closure.stderr
@@ -4,7 +4,7 @@ error[E0597]: `local_data` does not live long enough
 7  |         let ref_: &[u8] = &local_data;
    |                           ^^^^^^^^^^^ borrowed value does not live long enough
 ...
-13 |         PyCFunction::new_closure(closure_fn, "name", "doc", py).unwrap().into()
+13 |         PyCFunction::new_closure(py, "name", "doc", closure_fn).unwrap().into()
    |         ------------------------------------------------------- argument requires that `local_data` is borrowed for `'static`
 14 |     });
    |     - `local_data` dropped here while still borrowed
@@ -20,7 +20,7 @@ error[E0373]: closure may outlive the current function, but it borrows `ref_`, w
 note: function requires argument type to outlive `'static`
   --> tests/ui/invalid_closure.rs:13:9
    |
-13 |         PyCFunction::new_closure(closure_fn, "name", "doc", py).unwrap().into()
+13 |         PyCFunction::new_closure(py, "name", "doc", closure_fn).unwrap().into()
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 help: to force the closure to take ownership of `ref_` (and any other referenced variables), use the `move` keyword
    |