--- a/fmap.h.orig	2021-06-18 08:53:48.676566571 -0400
+++ b/fmap.h	2021-06-18 08:54:48.235790701 -0400
@@ -64,6 +64,8 @@
 	struct fmap_area areas[];
 }  __attribute__((packed));
 
+struct flashctx;
+
 int fmap_read_from_buffer(struct fmap **fmap_out, const uint8_t *buf, size_t len);
 int fmap_read_from_rom(struct fmap **fmap_out, struct flashctx *const flashctx, size_t rom_offset, size_t len);