diff --git a/TODO b/TODO
index 5776dc32310..dda6bc8782d 100644
--- a/TODO
+++ b/TODO
@@ -7,6 +7,7 @@ Zend
       traverse an array without copying each element.
     * look at replacing c-lib call tolower().
     * make hash API functions work with HASH_OF() to save time.
+    * native large number support (probably with GNU GMP)
 
 global
 ------