diff --git a/package/uboot-xburst/patches/100-fix-c_size.patch b/package/uboot-xburst/patches/100-fix-c_size.patch
new file mode 100644
index 000000000..31499e862
--- /dev/null
+++ b/package/uboot-xburst/patches/100-fix-c_size.patch
@@ -0,0 +1,18 @@
+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,