diff --git a/board/linksprite/pcduino/genimage.cfg b/board/linksprite/pcduino/genimage.cfg
index 0ff043415c..9cbc383d44 100644
--- a/board/linksprite/pcduino/genimage.cfg
+++ b/board/linksprite/pcduino/genimage.cfg
@@ -25,6 +25,7 @@ image sdcard.img {
 		in-partition-table = "no"
 		image = "u-boot-sunxi-with-spl.bin"
 		offset = 8192
+		size = 1040384 # 1MB - 8192
 	}
 
 	partition boot {