diff --git a/include/mmc.h b/include/mmc.h
index fcb237e..b913a60 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -189,12 +189,12 @@ struct mmc_csd
 	u8	tran_speed;
 	u16	ccc:12,
 		read_bl_len:4;
+	u32	c_size:22;
 	u64	read_bl_partial:1,
 		write_blk_misalign:1,
 		read_blk_misalign:1,
 		dsr_imp:1,
 		rsvd2:2,
-		c_size:12,
 		vdd_r_curr_min:3,
 		vdd_r_curr_max:3,
 		vdd_w_curr_min:3,