diff --git a/src/ffi3/objimpl.rs b/src/ffi3/objimpl.rs
index ca5bee0c..c033e43a 100644
--- a/src/ffi3/objimpl.rs
+++ b/src/ffi3/objimpl.rs
@@ -43,7 +43,7 @@ impl Default for PyObjectArenaAllocator {
 #[inline(always)]
 #[allow(unused_parens)]
 pub unsafe fn PyType_IS_GC(t : *mut PyTypeObject) -> c_int {
-    PyType_HasFeature((t), Py_TPFLAGS_HAVE_GC)
+    PyType_HasFeature(t, Py_TPFLAGS_HAVE_GC)
 }
 
 /// Test if an object has a GC head
diff --git a/src/lib.rs b/src/lib.rs
index 7db6f99d..8f1b65f6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,4 @@
 #![feature(specialization, proc_macro, try_from, fn_must_use)]
-#![feature(const_fn, const_unsafe_cell_new, const_size_of, const_ptr_null, const_ptr_null_mut)]
 
 //! Rust bindings to the Python interpreter.
 //!
@@ -130,7 +129,7 @@
 //!
 //! The extension module can then be imported into Python:
 //!
-//! ```python
+//! ```python,ignore
 //! >>> import hello
 //! >>> hello.run_rust_func("test")
 //! Rust says: Hello Python!