diff --git a/reference/functions.md b/reference/functions.md
index d8c506d7c9..57d64aa796 100644
--- a/reference/functions.md
+++ b/reference/functions.md
@@ -2172,6 +2172,7 @@ Returns the result of raising `i1` to the power of `i2`. In the event of an _ove
 * if `i1` is `1`, return `1`
 * if `i1` is `0`, return `0`
 * if `i2` is `1`, return `i1`
+* if `i2` is `0`, return `1`
 * if `i2` is negative or greater than `u32::MAX`, throw a runtime error
 
 **example:**