diff --git a/include/result.h b/include/result.h
index edc70e3..a4beda8 100644
--- a/include/result.h
+++ b/include/result.h
@@ -10,6 +10,8 @@ enum libab_result_e {
     LIBAB_MALLOC,
     LIBAB_BAD_PATTERN,
     LIBAB_FAILED_MATCH,
+    LIBAB_UNKNOWN_TYPE,
+    LIBAB_BAD_TYPE,
     LIBAB_EOF,
     LIBAB_UNEXPECTED
 };