diff --git a/xen/common/memory.c b/xen/common/memory.c
index 7364fd2c33..309e872edf 100644
--- a/xen/common/memory.c
+++ b/xen/common/memory.c
@@ -1225,7 +1225,7 @@ long do_memory_op(unsigned long cmd, XEN_GUEST_HANDLE_PARAM(void) arg)
              * hypercall has failed and only part of the extents where
              * processed.
              */
-            pv_shim_offline_memory(args.nr_extents, args.nr_done);
+            pv_shim_offline_memory(args.nr_done, args.extent_order);
 #endif
 
         break;