diff --git a/src/race.rs b/src/race.rs
index ee3d51a..fe36fa1 100644
--- a/src/race.rs
+++ b/src/race.rs
@@ -351,7 +351,7 @@ mod once_box {
                 Ordering::AcqRel,
                 Ordering::Acquire,
             );
-            if let Err(_) = exchange {
+            if exchange.is_err() {
                 let value = unsafe { Box::from_raw(ptr) };
                 return Err(value);
             }