diff --git a/common/image-fit-sig.c b/common/image-fit-sig.c
index 4edebbf2d3..63e5423c92 100644
--- a/common/image-fit-sig.c
+++ b/common/image-fit-sig.c
@@ -85,7 +85,7 @@ static int fit_image_setup_verify(struct image_sign_info *info,
 
 	memset(info, '\0', sizeof(*info));
 	info->keyname = fdt_getprop(fit, noffset, FIT_KEY_HINT, NULL);
-	info->fit = (void *)fit;
+	info->fit = fit;
 	info->node_offset = noffset;
 	info->name = algo_name;
 	info->checksum = image_get_checksum_algo(algo_name);
diff --git a/include/image.h b/include/image.h
index 34d13ada84..fd662e74b4 100644
--- a/include/image.h
+++ b/include/image.h
@@ -1159,7 +1159,7 @@ struct image_sign_info {
 	const char *keydir;		/* Directory conaining keys */
 	const char *keyname;		/* Name of key to use */
 	const char *keyfile;		/* Filename of private or public key */
-	void *fit;			/* Pointer to FIT blob */
+	const void *fit;		/* Pointer to FIT blob */
 	int node_offset;		/* Offset of signature node */
 	const char *name;		/* Algorithm name */
 	struct checksum_algo *checksum;	/* Checksum algorithm information */