diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 9c51f9f..cd237f4 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -111,7 +111,7 @@
 /*
  * run-time system-wide default policy => local allocation
  */
-struct mempolicy default_policy = {
+static struct mempolicy default_policy = {
 	.refcnt = ATOMIC_INIT(1), /* never free it */
 	.mode = MPOL_PREFERRED,
 	.flags = MPOL_F_LOCAL,