2 files changed, 2 insertions, 2 deletions
diff --git a/genimage.h b/genimage.h
index 44bc02f..2c85786 100644
--- a/genimage.h
+++ b/genimage.h
@@ -174,7 +174,7 @@ int insert_image(struct image *image, struct image *sub,
 		 unsigned long long size, unsigned long long offset,
 		 unsigned char byte);
 int insert_data(struct image *image, const void *data, const char *outfile,
-		size_t size, long offset);
+		size_t size, unsigned long long offset);
 int extend_file(struct image *image, size_t size);
 int reload_partitions(struct image *image);
 int parse_holes(struct image *image, cfg_t *cfg);
diff --git a/util.c b/util.c
index f4da26e..d931f5e 100644
--- a/util.c
+++ b/util.c
@@ -642,7 +642,7 @@ out:
 }
 
 int insert_data(struct image *image, const void *_data, const char *outfile,
-		size_t size, long offset)
+		size_t size, unsigned long long offset)
 {
 	const char *data = _data;
 	int outf = -1;