diff --git a/mm/vmscan.c b/mm/vmscan.c
index 0facbf9930d3..9c1538438023 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -172,7 +172,7 @@ struct scan_control {
 int vm_swappiness = 60;
 
 #define DEF_KSWAPD_THREADS_PER_NODE 1
-int kswapd_threads = DEF_KSWAPD_THREADS_PER_NODE;
+static int kswapd_threads = DEF_KSWAPD_THREADS_PER_NODE;
 static int __init kswapd_per_node_setup(char *str)
 {
 	int tmp;