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 3d4d1288..20c1ec5c 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
@@ -71,6 +71,13 @@
empty
string of text to separate each checkbox item
+
+ assign
+ string
+ No
+ empty
+ assign checkbox tags to an array instead of output (separator ignored)
+
labels
boolean
diff --git a/docs/en/designers/language-custom-functions/language-function-html-radios.xml b/docs/en/designers/language-custom-functions/language-function-html-radios.xml
index 1253731c..c64d1fbe 100644
--- a/docs/en/designers/language-custom-functions/language-function-html-radios.xml
+++ b/docs/en/designers/language-custom-functions/language-function-html-radios.xml
@@ -70,6 +70,13 @@
empty
string of text to separate each radio item
+
+ assign
+ string
+ No
+ empty
+ assign radio tags to an array instead of output (separator ignored)
+