diff --git a/usr.bin/mkimg/vhd.c b/usr.bin/mkimg/vhd.c
index d747450ff1fd..ee9091ca134c 100644
--- a/usr.bin/mkimg/vhd.c
+++ b/usr.bin/mkimg/vhd.c
@@ -282,6 +282,7 @@ vhd_write(int fd)
 
 	blk = 0;
 	blkcnt = VHD_BLOCK_SIZE / secsz;
+	error = 0;
 	nblks = image_get_size();
 	while (blk < nblks) {
 		if (!image_data(blk, blkcnt)) {