diff --git a/sys/fs/specfs/spec_vnops.c b/sys/fs/specfs/spec_vnops.c
index 6b33df4777f9..3b9536ddadf2 100644
--- a/sys/fs/specfs/spec_vnops.c
+++ b/sys/fs/specfs/spec_vnops.c
@@ -497,6 +497,7 @@ spec_freeblks(ap)
 	bp->b_blkno = ap->a_addr;
 	bp->b_offset = dbtob(ap->a_addr);
 	bp->b_bcount = ap->a_length;
+	BUF_KERNPROC(bp);
 	DEV_STRATEGY(bp, 0);
 	return (0);
 }
diff --git a/sys/miscfs/specfs/spec_vnops.c b/sys/miscfs/specfs/spec_vnops.c
index 6b33df4777f9..3b9536ddadf2 100644
--- a/sys/miscfs/specfs/spec_vnops.c
+++ b/sys/miscfs/specfs/spec_vnops.c
@@ -497,6 +497,7 @@ spec_freeblks(ap)
 	bp->b_blkno = ap->a_addr;
 	bp->b_offset = dbtob(ap->a_addr);
 	bp->b_bcount = ap->a_length;
+	BUF_KERNPROC(bp);
 	DEV_STRATEGY(bp, 0);
 	return (0);
 }