diff --git a/src/d3d12/mod.rs b/src/d3d12/mod.rs
index 6236fd9..b2467e2 100644
--- a/src/d3d12/mod.rs
+++ b/src/d3d12/mod.rs
@@ -628,7 +628,7 @@ impl Allocator {
             device.CheckFeatureSupport(
                 D3D12_FEATURE_D3D12_OPTIONS,
                 <*mut D3D12_FEATURE_DATA_D3D12_OPTIONS>::cast(&mut options),
-                std::mem::size_of_val(&options) as u32,
+                size_of_val(&options) as u32,
             )
         }
         .map_err(|e| {