diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 50e084d..0821a2b 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -39,7 +39,7 @@
  */
 #define SNAPSHOT_PAGES 256
 
-struct workqueue_struct *ksnapd;
+static struct workqueue_struct *ksnapd;
 static void flush_queued_bios(struct work_struct *work);
 
 struct pending_exception {