diff --git a/Cargo.toml b/Cargo.toml
index 0cd086c721..8c50093467 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,3 +18,6 @@ rust_2018_idioms = { level = "warn", priority = -1 }
 unused_qualifications = "warn"
 missing_docs = "warn"
 unexpected_cfgs = { level = "warn", check-cfg = ['cfg(windows_raw_dylib, windows_debugger_visualizer)'] }
+
+# See https://github.com/microsoft/windows-rs/issues/3076
+unused-qualifications = { level = "allow" }
diff --git a/crates/libs/core/src/imp/weak_ref_count.rs b/crates/libs/core/src/imp/weak_ref_count.rs
index 92fcf67313..a6baa606b9 100644
--- a/crates/libs/core/src/imp/weak_ref_count.rs
+++ b/crates/libs/core/src/imp/weak_ref_count.rs
@@ -63,8 +63,7 @@ impl WeakRefCount {
 
         let tear_off = TearOff::new(object, count_or_pointer as u32);
         let tear_off_ptr: *mut c_void = transmute_copy(&tear_off);
-        let encoding: usize =
-            ((tear_off_ptr as usize) >> 1) | (1 << (core::mem::size_of::<usize>() * 8 - 1));
+        let encoding: usize = ((tear_off_ptr as usize) >> 1) | (1 << (usize::BITS - 1));
 
         loop {
             match self.0.compare_exchange_weak(