diff --git a/util/qemu-coroutine-lock.c b/util/qemu-coroutine-lock.c
index 5816bf8900..eb73cf11dc 100644
--- a/util/qemu-coroutine-lock.c
+++ b/util/qemu-coroutine-lock.c
@@ -204,7 +204,6 @@ static void coroutine_fn qemu_co_mutex_lock_slowpath(AioContext *ctx,
     unsigned old_handoff;
 
     trace_qemu_co_mutex_lock_entry(mutex, self);
-    w.co = self;
     push_waiter(mutex, &w);
 
     /* This is the "Responsibility Hand-Off" protocol; a lock() picks from