diff --git a/extensions/custom_type.rs b/extensions/custom_type.rs
index 1cc0aa25..b4f79534 100644
--- a/extensions/custom_type.rs
+++ b/extensions/custom_type.rs
@@ -5,7 +5,7 @@
 
 #[macro_use] extern crate cpython;
 
-use cpython::{Python, PyObject, PyType, PyRustObject, PyRustType, PyResult, GILProtected};
+use cpython::{Python, PyObject, PyRustObject, PyRustType, PyResult, GILProtected};
 use std::cell::RefCell;
 
 static MY_TYPE: GILProtected<RefCell<Option<PyRustType<i32>>>> = GILProtected::new(RefCell::new(None));
diff --git a/src/rustobject/typebuilder.rs b/src/rustobject/typebuilder.rs
index 7b14e350..71930fa3 100644
--- a/src/rustobject/typebuilder.rs
+++ b/src/rustobject/typebuilder.rs
@@ -208,7 +208,7 @@ impl <'p, T, B> PyRustTypeBuilder<'p, T, B> where T: 'static + Send, B: PythonBa
     /// Sets the constructor (__new__ method)
     ///
     /// As `new` argument, use either the `py_fn!()` or the `py_class_method!()` macro.
-    pub fn set_new(mut self, new: T) -> Self where T: TypeConstructor {
+    pub fn set_new<N>(mut self, new: N) -> Self where N: TypeConstructor {
         let tp_new = new.tp_new();
 
         #[cfg(feature="python27-sys")] unsafe {