diff --git a/ash/src/vk.rs b/ash/src/vk.rs
index 8b469d2..beea055 100644
--- a/ash/src/vk.rs
+++ b/ash/src/vk.rs
@@ -45,11 +45,11 @@ pub type VisualID = c_uint;
 pub type Display = *const c_void;
 pub type Window = c_ulong;
 #[allow(non_camel_case_types)]
-pub type xcb_connection_t = *const c_void;
+pub type xcb_connection_t = c_void;
 #[allow(non_camel_case_types)]
 pub type xcb_window_t = u32;
 #[allow(non_camel_case_types)]
-pub type xcb_visualid_t = *const c_void;
+pub type xcb_visualid_t = u32;
 pub type MirConnection = *const c_void;
 pub type MirSurface = *const c_void;
 pub type HINSTANCE = *const c_void;
diff --git a/generator/src/lib.rs b/generator/src/lib.rs
index dd71e92..d3da613 100644
--- a/generator/src/lib.rs
+++ b/generator/src/lib.rs
@@ -341,11 +341,11 @@ pub fn platform_specific_types() -> Tokens {
         pub type Display = *const c_void;
         pub type Window = c_ulong;
         #[allow(non_camel_case_types)]
-        pub type xcb_connection_t = *const c_void;
+        pub type xcb_connection_t = c_void;
         #[allow(non_camel_case_types)]
         pub type xcb_window_t = u32;
         #[allow(non_camel_case_types)]
-        pub type xcb_visualid_t = *const c_void;
+        pub type xcb_visualid_t = u32;
         pub type MirConnection = *const c_void;
         pub type MirSurface = *const c_void;
         pub type HINSTANCE = *const c_void;