diff --git a/lib/lockref.c b/lib/lockref.c
index 494994bf17c8..5a92189ad711 100644
--- a/lib/lockref.c
+++ b/lib/lockref.c
@@ -3,14 +3,6 @@
 
 #if USE_CMPXCHG_LOCKREF
 
-/*
- * Allow weakly-ordered memory architectures to provide barrier-less
- * cmpxchg semantics for lockref updates.
- */
-#ifndef cmpxchg64_relaxed
-# define cmpxchg64_relaxed cmpxchg64
-#endif
-
 /*
  * Note that the "cmpxchg()" reloads the "old" value for the
  * failure case.