diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index ae98d67..2da0c91 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -94,6 +94,7 @@
 	unsigned short		max_phys_segs;	/* see blk_queue_max_phys_segments */
 	unsigned short		max_sectors;	/* see blk_queue_max_sectors */
 	unsigned short		unused;
+	unsigned int		max_blk_size;	/* maximum size of one mmc block */
 
 	/* private data */
 	struct mmc_ios		ios;		/* current io bus settings */