diff --git a/README.rst b/README.rst
index 4e64732..009af9a 100644
--- a/README.rst
+++ b/README.rst
@@ -122,7 +122,8 @@ Partition options:
 :image:			The image file this partition shall be filled with
 :fill:			Boolean specifying that all bytes of the partition should be
 			explicitly initialized. Any bytes beyond the size of the specified
-			image will be set to 0.
+			image will be set to ``fill-value``.
+:fill-value:		Byte value used when ``fill`` is true, defaults to 0.
 :autoresize:		Boolean specifying that the partition should be resized
 			automatically. For UBI volumes this means that the
 			``autoresize`` flag is set. Only one volume can have this flag.
diff --git a/genimage.c b/genimage.c
index 357e431..d2219f6 100644
--- a/genimage.c
+++ b/genimage.c
@@ -102,6 +102,7 @@ static cfg_opt_t partition_opts[] = {
 	CFG_BOOL("hidden", cfg_false, CFGF_NONE),
 	CFG_BOOL("no-automount", cfg_false, CFGF_NONE),
 	CFG_BOOL("fill", cfg_false, CFGF_NONE),
+	CFG_INT("fill-value", 0, CFGF_NONE),
 	CFG_STR("image", NULL, CFGF_NONE),
 	CFG_STR_LIST("holes", NULL, CFGF_NONE),
 	CFG_BOOL("autoresize", 0, CFGF_NONE),
@@ -403,6 +404,7 @@ static int parse_partitions(struct image *image, cfg_t *imagesec)
 		part->hidden = cfg_getbool(partsec, "hidden");
 		part->no_automount = cfg_getbool(partsec, "no-automount");
 		part->fill = cfg_getbool(partsec, "fill");
+		part->fill_value = cfg_getint(partsec, "fill-value");
 		part->image = cfg_getstr(partsec, "image");
 		part->autoresize = cfg_getbool(partsec, "autoresize");
 		part->in_partition_table = cfg_getbool(partsec, "in-partition-table");
diff --git a/genimage.h b/genimage.h
index 055e294..4184170 100644
--- a/genimage.h
+++ b/genimage.h
@@ -45,6 +45,7 @@ struct partition {
 	cfg_bool_t hidden;
 	cfg_bool_t no_automount;
 	cfg_bool_t fill;
+	unsigned char fill_value;
 	const char *image;
 	off_t imageoffset;
 	struct list_head list;
diff --git a/image-hd.c b/image-hd.c
index 5839154..88783b3 100644
--- a/image-hd.c
+++ b/image-hd.c
@@ -609,7 +609,8 @@ static int hdimage_generate(struct image *image)
 			return -E2BIG;
 		}
 
-		ret = insert_image(image, child, part->fill ? part->size : child->size, part->offset, 0);
+		ret = insert_image(image, child, part->fill ? part->size : child->size,
+				   part->offset, part->fill_value);
 		if (ret) {
 			image_error(image, "failed to write image partition '%s'\n",
 					part->name);