diff --git a/arch/m68k/emu/nfblock.c b/arch/m68k/emu/nfblock.c
index 93536cf2a38e..fa6256c5af22 100644
--- a/arch/m68k/emu/nfblock.c
+++ b/arch/m68k/emu/nfblock.c
@@ -132,7 +132,8 @@ static int __init nfhd_init_one(int id, u32 blocks, u32 bsize)
 	dev->disk->minors = 16;
 	dev->disk->fops = &nfhd_ops;
 	dev->disk->private_data = dev;
-	sprintf(dev->disk->disk_name, "nfhd%u", dev_id);
+	snprintf(dev->disk->disk_name, sizeof(dev->disk->disk_name), "nfhd%u",
+		 dev_id);
 	set_capacity(dev->disk, (sector_t)blocks * (bsize / 512));
 	err = add_disk(dev->disk);
 	if (err)