diff --git a/drivers/mtd/afs.c b/drivers/mtd/afs.c
index d072ca5be689..cec7ab98b2a9 100644
--- a/drivers/mtd/afs.c
+++ b/drivers/mtd/afs.c
@@ -239,7 +239,7 @@ static int parse_afs_partitions(struct mtd_info *mtd,
 		parts[idx].offset	= img_ptr;
 		parts[idx].mask_flags	= 0;
 
-		printk("  mtd%d: at 0x%08x, %5dKB, %8u, %s\n",
+		printk("  mtd%d: at 0x%08x, %5lluKiB, %8u, %s\n",
 			idx, img_ptr, parts[idx].size / 1024,
 			iis.imageNumber, str);