diff --git a/Cargo.toml b/Cargo.toml
index 6bbccfc1..da74ccfa 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,7 +4,7 @@ name    = "sdl2"
 description = "SDL2 bindings for Rust"
 repository = "https://github.com/AngryLawyer/rust-sdl2"
 documentation = "http://angrylawyer.github.io/rust-sdl2/sdl2/"
-version = "0.23.0"
+version = "0.23.1"
 license = "MIT"
 authors = [ "Tony Aldridge <tony@angry-lawyer.com>" ]
 keywords = ["SDL", "windowing", "graphics"]
diff --git a/sdl2-sys/Cargo.toml b/sdl2-sys/Cargo.toml
index eec80d35..3d8b1d62 100644
--- a/sdl2-sys/Cargo.toml
+++ b/sdl2-sys/Cargo.toml
@@ -3,7 +3,7 @@
 name = "sdl2-sys"
 description = "Raw SDL2 bindings for Rust, used internally rust-sdl2"
 repository = "https://github.com/AngryLawyer/rust-sdl2"
-version = "0.23.0"
+version = "0.23.1"
 authors = ["Tony Aldridge <tony@angry-lawyer.com>"]
 license = "MIT"
 links = "SDL2"
diff --git a/sdl2-sys/src/clipboard.rs b/sdl2-sys/src/clipboard.rs
index df35d4d4..baf9d3bc 100644
--- a/sdl2-sys/src/clipboard.rs
+++ b/sdl2-sys/src/clipboard.rs
@@ -1,6 +1,5 @@
 use libc::{c_int, c_char};
-
-pub type SDL_bool = c_int;
+use sdl::SDL_bool;
 
 extern "C" {
     pub fn SDL_SetClipboardText(text: *const c_char) -> c_int;
diff --git a/sdl2-sys/src/controller.rs b/sdl2-sys/src/controller.rs
index 503c8b67..6d2de287 100644
--- a/sdl2-sys/src/controller.rs
+++ b/sdl2-sys/src/controller.rs
@@ -3,8 +3,7 @@ use core::prelude::*;
 use libc::{c_int, c_char, c_uchar, c_uint, c_void, int16_t, uint8_t};
 use joystick::{SDL_Joystick, SDL_JoystickGUID};
 use super::rwops::SDL_RWops;
-
-pub type SDL_bool = c_int;
+use sdl::SDL_bool;
 
 pub type SDL_GameController = c_void;
 
diff --git a/sdl2-sys/src/cpuinfo.rs b/sdl2-sys/src/cpuinfo.rs
index 12990c8f..fb6e6933 100644
--- a/sdl2-sys/src/cpuinfo.rs
+++ b/sdl2-sys/src/cpuinfo.rs
@@ -1,6 +1,5 @@
 use libc::{c_int};
-
-pub type SDL_bool = c_int;
+use sdl::SDL_bool;
 
 // SDL_cpuinfo.h
 extern "C" {
diff --git a/sdl2-sys/src/event.rs b/sdl2-sys/src/event.rs
index 76f3921a..d493e536 100644
--- a/sdl2-sys/src/event.rs
+++ b/sdl2-sys/src/event.rs
@@ -6,16 +6,16 @@ use gesture::SDL_GestureID;
 use keyboard::SDL_Keysym;
 use touch::SDL_FingerID;
 use touch::SDL_TouchID;
+use sdl::SDL_bool;
+
 #[cfg(feature = "no_std")]
 use core::prelude::*;
 
-pub type SDL_bool = c_int;
-
 // SDL_events.h
-pub type SDL_EventState = uint8_t;
-pub const SDL_DISABLE: SDL_EventState = 0;
-pub const SDL_ENABLE: SDL_EventState = 1;
-pub const SDL_QUERY: SDL_EventState = 0xFF;
+pub type SDL_State = c_int;
+pub const SDL_DISABLE: SDL_State = 0;
+pub const SDL_ENABLE: SDL_State = 1;
+pub const SDL_QUERY: SDL_State = -1;
 
 pub type SDL_SysWMmsg = c_void;
 
@@ -466,6 +466,6 @@ extern "C" {
     pub fn SDL_AddEventWatch(filter: SDL_EventFilter, userdata: *mut c_void);
     pub fn SDL_DelEventWatch(filter: SDL_EventFilter, userdata: *mut c_void);
     pub fn SDL_FilterEvents(filter: SDL_EventFilter, userdata: *mut c_void);
-    pub fn SDL_EventState(type_: uint32_t, state: SDL_EventState) -> SDL_EventState;
+    pub fn SDL_EventState(type_: uint32_t, state: SDL_State) -> SDL_State;
     pub fn SDL_RegisterEvents(numevents: c_int) -> uint32_t;
 }
diff --git a/sdl2-sys/src/hint.rs b/sdl2-sys/src/hint.rs
index db8d48a5..68fb0cca 100644
--- a/sdl2-sys/src/hint.rs
+++ b/sdl2-sys/src/hint.rs
@@ -1,6 +1,5 @@
-use libc::{c_int, c_char};
-
-pub type SDL_bool = c_int;
+use libc::c_char;
+use sdl::SDL_bool;
 
 #[derive(Copy, Clone)]
 #[repr(C)]
diff --git a/sdl2-sys/src/joystick.rs b/sdl2-sys/src/joystick.rs
index 388b6714..690bcbad 100644
--- a/sdl2-sys/src/joystick.rs
+++ b/sdl2-sys/src/joystick.rs
@@ -1,6 +1,5 @@
 use libc::{c_int, c_char, c_void, int32_t, int16_t, int8_t, uint8_t};
-
-pub type SDL_bool = c_int;
+use sdl::SDL_bool;
 
 pub type SDL_Joystick = c_void;
 
diff --git a/sdl2-sys/src/keyboard.rs b/sdl2-sys/src/keyboard.rs
index 6bee6059..a0d7090d 100644
--- a/sdl2-sys/src/keyboard.rs
+++ b/sdl2-sys/src/keyboard.rs
@@ -4,8 +4,7 @@ use rect::SDL_Rect;
 use video::SDL_Window;
 use scancode::SDL_Scancode;
 use keycode::{SDL_Keycode, SDL_Keymod};
-
-pub type SDL_bool = c_int;
+use sdl::SDL_bool;
 
 // SDL_keyboard.h
 #[derive(Copy, Clone)]
diff --git a/sdl2-sys/src/lib.rs b/sdl2-sys/src/lib.rs
index a988c095..bc093957 100644
--- a/sdl2-sys/src/lib.rs
+++ b/sdl2-sys/src/lib.rs
@@ -32,3 +32,29 @@ pub mod sdl;
 pub mod timer;
 pub mod version;
 pub mod hint;
+
+pub use scancode::*;
+pub use keycode::*;
+pub use audio::*;
+pub use clipboard::*;
+pub use controller::*;
+pub use cpuinfo::*;
+pub use event::*;
+pub use filesystem::*;
+pub use haptic::*;
+pub use gesture::*;
+pub use joystick::*;
+pub use keyboard::*;
+pub use messagebox::*;
+pub use rect::*;
+pub use pixels::*;
+pub use render::*;
+pub use rwops::*;
+pub use surface::*;
+pub use touch::*;
+pub use video::*;
+pub use mouse::*;
+pub use sdl::*;
+pub use timer::*;
+pub use version::*;
+pub use hint::*;
diff --git a/sdl2-sys/src/mouse.rs b/sdl2-sys/src/mouse.rs
index 130ca22f..56437b6d 100644
--- a/sdl2-sys/src/mouse.rs
+++ b/sdl2-sys/src/mouse.rs
@@ -1,8 +1,9 @@
 use libc::{c_int, c_uint, c_void, uint8_t, uint32_t};
 use surface::SDL_Surface;
 use video::SDL_Window;
+use sdl::SDL_bool;
+use event::SDL_State;
 
-pub type SDL_bool = c_int;
 pub type SDL_Cursor = c_void;
 
 pub type SDL_SystemCursor = c_uint;
@@ -20,10 +21,7 @@ pub const SDL_SYSTEM_CURSOR_NO: SDL_SystemCursor = 10;
 pub const SDL_SYSTEM_CURSOR_HAND: SDL_SystemCursor = 11;
 pub const SDL_NUM_SYSTEM_CURSORS: SDL_SystemCursor = 12;
 
-pub type SDL_MouseState = c_int;
-pub const SDL_DISABLE: SDL_MouseState = 0;
-pub const SDL_ENABLE: SDL_MouseState = 1;
-pub const SDL_QUERY: SDL_MouseState = -1;
+
 
 pub const SDL_BUTTON_LEFT: u8 = 1;
 pub const SDL_BUTTON_MIDDLE: u8 = 2;
@@ -54,5 +52,5 @@ extern "C" {
     pub fn SDL_GetCursor() -> *mut SDL_Cursor;
     pub fn SDL_GetDefaultCursor() -> *mut SDL_Cursor;
     pub fn SDL_FreeCursor(cursor: *mut SDL_Cursor);
-    pub fn SDL_ShowCursor(toggle: SDL_MouseState) -> SDL_MouseState;
+    pub fn SDL_ShowCursor(toggle: SDL_State) -> SDL_State;
 }
diff --git a/sdl2-sys/src/pixels.rs b/sdl2-sys/src/pixels.rs
index 9ed6c60d..e9138231 100644
--- a/sdl2-sys/src/pixels.rs
+++ b/sdl2-sys/src/pixels.rs
@@ -1,6 +1,5 @@
 use libc::{c_int, uint8_t, uint32_t};
-
-pub type SDL_bool = c_int;
+use sdl::SDL_bool;
 
 //SDL_pixels.h
 #[derive(Copy, Clone)]
diff --git a/sdl2-sys/src/rect.rs b/sdl2-sys/src/rect.rs
index db2a014d..75b5564d 100644
--- a/sdl2-sys/src/rect.rs
+++ b/sdl2-sys/src/rect.rs
@@ -1,4 +1,5 @@
 use libc::c_int;
+use sdl::SDL_bool;
 
 /// A structure that defines a two dimensional point.
 #[derive(Copy, Clone, Eq, PartialEq, Debug, Hash)]
@@ -18,8 +19,6 @@ pub struct SDL_Rect {
     pub h: c_int
 }
 
-pub type SDL_bool = c_int;
-
 extern "C" {
     pub fn SDL_HasIntersection(A: *const SDL_Rect, B: *const SDL_Rect) -> SDL_bool;
     pub fn SDL_IntersectRect(A: *const SDL_Rect, B: *const SDL_Rect, result: *mut SDL_Rect) -> SDL_bool;
diff --git a/sdl2-sys/src/render.rs b/sdl2-sys/src/render.rs
index c3396250..704bb501 100644
--- a/sdl2-sys/src/render.rs
+++ b/sdl2-sys/src/render.rs
@@ -1,11 +1,9 @@
 use libc::{c_int, c_uint, c_char, c_void, c_float, c_double};
 use libc::{uint8_t, uint32_t};
 use rect::{SDL_Point, SDL_Rect};
-
 use surface::SDL_Surface;
 use video::SDL_Window;
-
-pub type SDL_bool = c_int;
+use sdl::SDL_bool;
 
 //SDL_render.h
 pub type SDL_RendererFlags = c_uint;
diff --git a/sdl2-sys/src/rwops.rs b/sdl2-sys/src/rwops.rs
index ec2f0d0c..1c936808 100644
--- a/sdl2-sys/src/rwops.rs
+++ b/sdl2-sys/src/rwops.rs
@@ -1,5 +1,6 @@
 use libc::{c_uchar, uint32_t, c_char, FILE, c_void};
 use libc::{c_int, int64_t, size_t};
+use sdl::SDL_bool;
 
 #[allow(dead_code)]
 #[repr(C)]
@@ -7,8 +8,6 @@ struct SDL_RWops_Anon {
     data: [c_uchar; 24],
 }
 
-pub type SDL_bool = c_int;
-
 pub static RW_SEEK_SET: c_int = 0;
 pub static RW_SEEK_CUR: c_int = 1;
 pub static RW_SEEK_END: c_int = 2;
diff --git a/sdl2-sys/src/sdl.rs b/sdl2-sys/src/sdl.rs
index 0a54b497..88157aed 100644
--- a/sdl2-sys/src/sdl.rs
+++ b/sdl2-sys/src/sdl.rs
@@ -18,6 +18,8 @@ mod others {
     extern {}
 }
 
+pub type SDL_bool = c_int;
+
 pub type SDL_errorcode = c_uint;
 pub const SDL_ENOMEM: SDL_errorcode = 0;
 pub const SDL_EFREAD: SDL_errorcode = 1;
@@ -50,7 +52,4 @@ extern "C" {
     pub fn SDL_QuitSubSystem(flags: SDL_InitFlag);
     pub fn SDL_WasInit(flags: SDL_InitFlag) -> SDL_InitFlag;
     pub fn SDL_Quit();
-
-    //SDL_timer.h
-    pub fn SDL_GetTicks() -> uint32_t;
 }
diff --git a/sdl2-sys/src/surface.rs b/sdl2-sys/src/surface.rs
index b3705800..719299ab 100644
--- a/sdl2-sys/src/surface.rs
+++ b/sdl2-sys/src/surface.rs
@@ -3,9 +3,8 @@ use pixels::SDL_Palette;
 use rwops::SDL_RWops;
 use rect::SDL_Rect;
 use libc::{c_int, c_void, uint32_t, uint8_t};
-pub use render::SDL_BlendMode;
-
-pub type SDL_bool = c_int;
+use render::SDL_BlendMode;
+use sdl::SDL_bool;
 
 pub type SDL_SurfaceFlag = uint32_t;
 
diff --git a/sdl2-sys/src/video.rs b/sdl2-sys/src/video.rs
index 4c782adc..ec1b4c74 100644
--- a/sdl2-sys/src/video.rs
+++ b/sdl2-sys/src/video.rs
@@ -1,12 +1,11 @@
 use rect::SDL_Rect;
 use surface::SDL_Surface;
+use sdl::SDL_bool;
 
 #[cfg(feature = "no_std")]
 use core::prelude::*;
 use libc::{c_void, c_int, c_float, c_char, uint16_t, uint32_t};
 
-pub type SDL_bool = c_int;
-
 //SDL_video.h
 #[allow(missing_copy_implementations)]
 #[repr(C)]
diff --git a/src/sdl2/mouse.rs b/src/sdl2/mouse.rs
index 5ec476de..3f61417e 100644
--- a/src/sdl2/mouse.rs
+++ b/src/sdl2/mouse.rs
@@ -210,7 +210,7 @@ impl MouseUtil {
     }
 
     pub fn is_cursor_showing(&self) -> bool {
-        unsafe { ll::SDL_ShowCursor(ll::SDL_QUERY) == 1 }
+        unsafe { ll::SDL_ShowCursor(::sys::SDL_QUERY) == 1 }
     }
 
     pub fn show_cursor(&self, show: bool) {
diff --git a/src/sdl2/surface.rs b/src/sdl2/surface.rs
index c675b0d2..b3ba8663 100644
--- a/src/sdl2/surface.rs
+++ b/src/sdl2/surface.rs
@@ -453,7 +453,7 @@ impl SurfaceRef {
     }
 
     pub fn blend_mode(&self) -> BlendMode {
-        let mut mode: ll::SDL_BlendMode = 0;
+        let mut mode: ::sys::SDL_BlendMode = 0;
         let result = unsafe {
             ll::SDL_GetSurfaceBlendMode(self.raw(), &mut mode)
         };