diff --git a/language/operators.xml b/language/operators.xml
index 84fd972664..d59e6688ec 100644
--- a/language/operators.xml
+++ b/language/operators.xml
@@ -1575,6 +1575,8 @@ echo "Should be 4: " . $a . "
\n";
(ASCII value of 'Z' is 90, ASCII value of '[' is 91).
Note that character variables can be incremented but not decremented and
even so only plain ASCII characters (a-z and A-Z) are supported.
+ Incrementing/decrementing other character variables has no effect, the
+ original string is unchanged.
Arithmetic Operations on Character Variables