diff --git a/include/efi_loader.h b/include/efi_loader.h
index c1e00eb..11930fb 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -931,6 +931,8 @@
 struct x509_certificate;
 struct pkcs7_message;
 
+bool efi_hash_regions(struct image_region *regs, int count,
+		      void **hash, const char *hash_algo, int *len);
 bool efi_signature_lookup_digest(struct efi_image_regions *regs,
 				 struct efi_signature_store *db,
 				 bool dbx);