diff --git a/ash/src/entry.rs b/ash/src/entry.rs
index b91a3d9..3552ab6 100644
--- a/ash/src/entry.rs
+++ b/ash/src/entry.rs
@@ -191,12 +191,14 @@ impl<V: FunctionPointers> Entry<V> {
 pub trait EntryV1_1: EntryV1_0 {
     fn fp_v1_1(&self) -> &vk::EntryFnV1_1;
 
-    unsafe fn enumerate_instance_version(&self) -> VkResult<vk::uint32_t> {
-        let mut api_version = mem::uninitialized();
-        let err_code = self.fp_v1_1().enumerate_instance_version(&mut api_version);
-        match err_code {
-            vk::Result::SUCCESS => Ok(api_version),
-            _ => Err(err_code),
+    fn enumerate_instance_version(&self) -> VkResult<vk::uint32_t> {
+        unsafe {
+            let mut api_version = 0;
+            let err_code = self.fp_v1_1().enumerate_instance_version(&mut api_version);
+            match err_code {
+                vk::Result::SUCCESS => Ok(api_version),
+                _ => Err(err_code),
+            }
         }
     }
 }