diff --git a/ash/Cargo.toml b/ash/Cargo.toml
index 46f37b7..167abd8 100644
--- a/ash/Cargo.toml
+++ b/ash/Cargo.toml
@@ -12,6 +12,7 @@ documentation = "https://docs.rs/ash"
 [dependencies]
 shared_library = "0.1.5"
 lazy_static = "0.2.1"
+libc = "0.2.26"
 
 [package.metadata.release]
 no-dev-version = true
diff --git a/ash/src/device.rs b/ash/src/device.rs
index 40500b8..bfe64b7 100644
--- a/ash/src/device.rs
+++ b/ash/src/device.rs
@@ -753,9 +753,9 @@ pub trait DeviceV1_0 {
         offset: vk::DeviceSize,
         size: vk::DeviceSize,
         flags: vk::MemoryMapFlags,
-    ) -> VkResult<*mut ()> {
+    ) -> VkResult<*mut vk::c_void> {
 
-        let mut data: *mut () = mem::uninitialized();
+        let mut data: *mut vk::c_void = mem::uninitialized();
         let err_code = self.fp_v1_0().map_memory(
             self.handle(),
             memory,
diff --git a/ash/src/lib.rs b/ash/src/lib.rs
index f75d3e8..ba433cb 100644
--- a/ash/src/lib.rs
+++ b/ash/src/lib.rs
@@ -1,3 +1,4 @@
+extern crate libc;
 extern crate shared_library;
 #[macro_use]
 extern crate lazy_static;
@@ -10,7 +11,7 @@ mod device;
 mod entry;
 pub mod prelude;
 pub mod vk;
-mod allocator;
+//mod allocator;
 pub mod extensions;
 pub mod version;
 pub mod util;
diff --git a/ash/src/util.rs b/ash/src/util.rs
index 44bb901..2d39682 100644
--- a/ash/src/util.rs
+++ b/ash/src/util.rs
@@ -52,7 +52,7 @@ impl AlignByteSlice {
 /// that is allocated on 4 bytes boundries, and insert the correct amount of paddings.
 #[derive(Debug, Clone)]
 pub struct Align<T> {
-    ptr: *mut (),
+    ptr: *mut vk::c_void,
     elem_size: vk::DeviceSize,
     size: vk::DeviceSize,
     _m: PhantomData<T>,
@@ -85,7 +85,11 @@ fn calc_padding(adr: vk::DeviceSize, align: vk::DeviceSize) -> vk::DeviceSize {
 }
 
 impl<T> Align<T> {
-    pub unsafe fn new(ptr: *mut (), alignment: vk::DeviceSize, size: vk::DeviceSize) -> Self {
+    pub unsafe fn new(
+        ptr: *mut vk::c_void,
+        alignment: vk::DeviceSize,
+        size: vk::DeviceSize,
+    ) -> Self {
         let padding = calc_padding(size_of::<T>() as vk::DeviceSize, alignment);
         let elem_size = size_of::<T>() as vk::DeviceSize + padding;
         assert!(calc_padding(size, alignment) == 0, "size must be aligned");
diff --git a/ash/src/vk.rs b/ash/src/vk.rs
index 9634c26..4daf1fb 100644
--- a/ash/src/vk.rs
+++ b/ash/src/vk.rs
@@ -199,23 +199,22 @@ macro_rules! vk_version_patch {
     ($minor: expr) => (($minor as uint32_t) & 0xfff)
 }
 
-mod libc_reexports {}
 pub mod types {
 #![allow(non_camel_case_types, dead_code)]
     use std::ops::*;
     use std::fmt;
     use std::ffi::CStr;
     use super::*;
-    #[allow(unused_imports)]
-    use super::libc_reexports::*;
-    pub type c_void = ();
-    pub type c_char = i8;
-    pub type uint32_t = u32;
-    pub type size_t = usize;
-    pub type uint64_t = u64;
-    pub type uint8_t = u8;
-    pub type c_float = f32;
-    pub type int32_t = i32;
+    use libc;
+
+    pub type c_void = libc::c_void;
+    pub type c_char = libc::c_char;
+    pub type uint32_t = libc::uint32_t;
+    pub type size_t = libc::size_t;
+    pub type uint64_t = libc::uint64_t;
+    pub type uint8_t = libc::uint8_t;
+    pub type c_float = libc::c_float;
+    pub type int32_t = libc::int32_t;
     pub type Display = *const ();
     pub type Window = *const ();
     pub type VisualID = *const ();
@@ -3913,8 +3912,6 @@ macro_rules! vk_functions {
 pub mod cmds {
 #![allow(dead_code)]
     use super::*;
-    #[allow(unused_imports)]
-    use super::libc_reexports::*;
 
     vk_functions!{
     StaticFn,
diff --git a/examples/src/bin/texture.rs b/examples/src/bin/texture.rs
index 5ef4add..956cb7f 100644
--- a/examples/src/bin/texture.rs
+++ b/examples/src/bin/texture.rs
@@ -147,7 +147,7 @@ fn main() {
         let index_buffer_memory = base.device
             .allocate_memory(&index_allocate_info, None)
             .unwrap();
-        let index_ptr = base.device
+        let index_ptr: *mut vk::c_void = base.device
             .map_memory(
                 index_buffer_memory,
                 0,
@@ -330,12 +330,12 @@ fn main() {
                 vk::MemoryMapFlags::empty(),
             )
             .unwrap();
-        let mut image_slice = AlignByteSlice::new(
+        let mut image_slice = Align::new(
             image_ptr,
-            image_buffer_memory_req.alignment,
+            std::mem::align_of::<u8>() as u64,
             image_buffer_memory_req.size,
         );
-        image_slice.copy_from_slices(&[&image_data]);
+        image_slice.copy_from_slice(&image_data);
         base.device.unmap_memory(image_buffer_memory);
         base.device
             .bind_buffer_memory(image_buffer, image_buffer_memory, 0)
diff --git a/examples/src/lib.rs b/examples/src/lib.rs
index d673a7d..5bbeecd 100644
--- a/examples/src/lib.rs
+++ b/examples/src/lib.rs
@@ -131,12 +131,12 @@ fn extension_names() -> Vec<*const i8> {
 
 unsafe extern "system" fn vulkan_debug_callback(_: vk::DebugReportFlagsEXT,
                                                 _: vk::DebugReportObjectTypeEXT,
-                                                _: u64,
-                                                _: usize,
-                                                _: i32,
-                                                _: *const i8,
-                                                p_message: *const i8,
-                                                _: *mut ())
+                                                _: vk::uint64_t,
+                                                _: vk::size_t,
+                                                _: vk::int32_t,
+                                                _: *const vk::c_char,
+                                                p_message: *const vk::c_char,
+                                                _: *mut vk::c_void)
                                                 -> u32 {
     println!("{:?}", CStr::from_ptr(p_message));
     1