Keep deprecated ATOMIC_USIZE_INIT to support old compilers
diff --git a/src/wrapper.rs b/src/wrapper.rs
index c45dff8..cbb6515 100644
--- a/src/wrapper.rs
+++ b/src/wrapper.rs
@@ -25,6 +25,7 @@
     use std::sync::atomic::*;
     use std::sync::Once;
 
+    #[allow(deprecated)]
     static WORKS: AtomicUsize = ATOMIC_USIZE_INIT;
     static INIT: Once = Once::new();