diff --git a/docs/en/designers/language-custom-functions/language-function-html-checkboxes.xml b/docs/en/designers/language-custom-functions/language-function-html-checkboxes.xml
index d31bce24..67445d53 100644
--- a/docs/en/designers/language-custom-functions/language-function-html-checkboxes.xml
+++ b/docs/en/designers/language-custom-functions/language-function-html-checkboxes.xml
@@ -78,6 +78,14 @@
true
add <label>-tags to the output
+
+ assign
+ string
+ No
+ empty
+ assign the output to an array with each checkbox's output
+ as one element.
+