diff --git a/bsip-0040.md b/bsip-0040.md
index 0bf6322..0693d0b 100644
--- a/bsip-0040.md
+++ b/bsip-0040.md
@@ -74,6 +74,7 @@ List of possible asserts are:
 | `range`      | [`min`, `max`] | stateless |
 | `limit` | [`value`, `interval_in_sec`]      | [`current_cumsum`, `interval_began`] |
 | `limit_monthly` | [`value`, `interval_in_months`]      | [`current_cumsum`, `interval_began`] |
+All asserts apply to `int`, `float` and `string`. If `string` should be compared with any number value, use the length of the string instead.
 
 Example A:
 Assume account A and B and some unrelated key K. Furthermore A has a custom active authority in the following way: