diff --git a/src/api/cocoa/helpers.rs b/src/api/cocoa/helpers.rs
index 7fd75710..7738e541 100644
--- a/src/api/cocoa/helpers.rs
+++ b/src/api/cocoa/helpers.rs
@@ -5,7 +5,6 @@ use GlProfile;
 use GlRequest;
 use PixelFormatRequirements;
 use ReleaseBehavior;
-use cocoa::foundation::NSAutoreleasePool;
 use cocoa::appkit::*;
 
 pub fn build_nsattributes<T>(pf_reqs: &PixelFormatRequirements, opengl: &GlAttributes<&T>)
diff --git a/src/api/cocoa/mod.rs b/src/api/cocoa/mod.rs
index 47a26530..a64f70b8 100644
--- a/src/api/cocoa/mod.rs
+++ b/src/api/cocoa/mod.rs
@@ -7,11 +7,8 @@ use libc;
 use ContextError;
 use GlAttributes;
 use GlContext;
-use GlProfile;
-use GlRequest;
 use PixelFormat;
 use PixelFormatRequirements;
-use ReleaseBehavior;
 use Robustness;
 use WindowAttributes;
 use native_monitor::NativeMonitorId;
@@ -40,7 +37,6 @@ use std::collections::VecDeque;
 use std::str::FromStr;
 use std::str::from_utf8;
 use std::sync::Mutex;
-use std::ascii::AsciiExt;
 use std::ops::Deref;
 
 use events::ElementState;
@@ -823,7 +819,7 @@ impl Clone for IdRef {
     }
 }
 
-#[allow(non_snake_case)]
+#[allow(non_snake_case, non_upper_case_globals)]
 unsafe fn NSEventToEvent(window: &Window, nsevent: id) -> Option<Event> {
     if nsevent == nil { return None; }
 
diff --git a/src/window.rs b/src/window.rs
index 4cac1ce0..c060fed1 100644
--- a/src/window.rs
+++ b/src/window.rs
@@ -6,16 +6,13 @@ use ContextError;
 use CreationError;
 use CursorState;
 use Event;
-use GlAttributes;
 use GlContext;
 use GlProfile;
 use GlRequest;
 use MouseCursor;
 use PixelFormat;
-use PixelFormatRequirements;
 use Robustness;
 use Window;
-use WindowAttributes;
 use WindowBuilder;
 use native_monitor::NativeMonitorId;