diff --git a/include/sourmash.h b/include/sourmash.h
index beb64ea455..f650035dec 100644
--- a/include/sourmash.h
+++ b/include/sourmash.h
@@ -49,6 +49,7 @@ enum SourmashErrorCode {
   SOURMASH_ERROR_CODE_NIFFLER_ERROR = 100005,
   SOURMASH_ERROR_CODE_CSV_ERROR = 100006,
   SOURMASH_ERROR_CODE_ROCKS_DB_ERROR = 100007,
+  SOURMASH_ERROR_CODE_ZIP_ERROR = 100008,
 };
 typedef uint32_t SourmashErrorCode;