diff --git a/include/efi_loader.h b/include/efi_loader.h
index f1dfb1d..7fd65ee 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -813,6 +813,8 @@
 				  int nocheck);
 
 void efi_sigstore_free(struct efi_signature_store *sigstore);
+struct efi_signature_store *efi_build_signature_store(void *sig_list,
+						      efi_uintn_t size);
 struct efi_signature_store *efi_sigstore_parse_sigdb(u16 *name);
 
 bool efi_secure_boot_enabled(void);