diff --git a/sys/dev/md/md.c b/sys/dev/md/md.c
index 27f54994d70..3b0eba934c9 100644
--- a/sys/dev/md/md.c
+++ b/sys/dev/md/md.c
@@ -384,7 +384,8 @@ mdstrategy(struct bio *bp)
 
 	if (md_debug > 1)
 		printf("mdstrategy(%p) %s %x, %lld, %ld, %p)\n",
-		    bp, devtoname(bp->bio_dev), bp->bio_flags, bp->bio_blkno,
+		    bp, devtoname(bp->bio_dev), bp->bio_flags, 
+		    (long long)bp->bio_blkno,
 		    bp->bio_bcount / DEV_BSIZE, bp->bio_data);
 
 	sc = bp->bio_dev->si_drv1;