diff --git a/lib/zip.h b/lib/zip.h
index 980eb91..b34039f 100644
--- a/lib/zip.h
+++ b/lib/zip.h
@@ -218,6 +218,7 @@
 ZIP_EXTERN zip_int64_t zip_add(struct zip *, const char *, struct zip_source *);
 ZIP_EXTERN zip_int64_t zip_add_dir(struct zip *, const char *);
 ZIP_EXTERN int zip_close(struct zip *);
+ZIP_EXTERN void zip_discard(struct zip *);
 ZIP_EXTERN int zip_delete(struct zip *, zip_uint64_t);
 ZIP_EXTERN void zip_error_clear(struct zip *);
 ZIP_EXTERN void zip_error_get(struct zip *, int *, int *);