diff --git a/vulkano/src/buffer/cpu_access.rs b/vulkano/src/buffer/cpu_access.rs
index ed464f12..95cc8398 100644
--- a/vulkano/src/buffer/cpu_access.rs
+++ b/vulkano/src/buffer/cpu_access.rs
@@ -122,9 +122,7 @@ impl<T> CpuAccessibleBuffer<T> {
                                        -> Result<Arc<CpuAccessibleBuffer<T>>, OomError>
         where I: IntoIterator<Item = QueueFamily<'a>>
     {
-        unsafe {
-            CpuAccessibleBuffer::raw(device, mem::size_of::<T>(), usage, queue_families)
-        }
+        CpuAccessibleBuffer::raw(device, mem::size_of::<T>(), usage, queue_families)
     }
 }
 
@@ -178,9 +176,7 @@ impl<T> CpuAccessibleBuffer<[T]> {
                                              -> Result<Arc<CpuAccessibleBuffer<[T]>>, OomError>
         where I: IntoIterator<Item = QueueFamily<'a>>
     {
-        unsafe {
-            CpuAccessibleBuffer::raw(device, len * mem::size_of::<T>(), usage, queue_families)
-        }
+        CpuAccessibleBuffer::raw(device, len * mem::size_of::<T>(), usage, queue_families)
     }
 }
 
diff --git a/vulkano/src/sync/event.rs b/vulkano/src/sync/event.rs
index c0b4373c..5326c546 100644
--- a/vulkano/src/sync/event.rs
+++ b/vulkano/src/sync/event.rs
@@ -10,13 +10,10 @@
 use std::mem;
 use std::ptr;
 use std::sync::Arc;
-use std::sync::Mutex;
-use std::sync::MutexGuard;
 
 use device::Device;
 use OomError;
 use Success;
-use SynchronizedVulkanObject;
 use VulkanObject;
 use VulkanPointers;
 use check_errors;