diff --git a/std/mutex.zig b/std/mutex.zig
index 25e6a5bd254b45d39c773377d0284c16b7ea2066..125a76347995814a76d5eb92f1b4bff3c4aa49a3 100644
--- a/std/mutex.zig
+++ b/std/mutex.zig
@@ -122,7 +122,7 @@ const MutexSpinLock = struct {
     pub fn deinit(self: *Mutex) void {}
 
     pub fn acquire(self: *Mutex) Held {
-        _ = self.spin_lock.acquire();
+        _ = self.lock.acquire();
         return Held { .mutex = self };
     }
 };