diff --git a/Include/pyatomic.h b/Include/pyatomic.h
index da45327..d4e19e0 100644
--- a/Include/pyatomic.h
+++ b/Include/pyatomic.h
@@ -58,6 +58,7 @@
 static __inline__ void
 _Py_ANNOTATE_MEMORY_ORDER(const volatile void *address, _Py_memory_order order)
 {
+    (void)address;		/* shut up -Wunused-parameter */
     switch(order) {
     case _Py_memory_order_release:
     case _Py_memory_order_acq_rel: