diff --git a/mm/swap.c b/mm/swap.c
index 017e72c..2ed7be3 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -514,5 +514,7 @@
 	 * Right now other parts of the system means that we
 	 * _really_ don't want to cluster much more
 	 */
+#ifdef CONFIG_HOTPLUG_CPU
 	hotcpu_notifier(cpu_swap_callback, 0);
+#endif
 }