diff --git a/docs/en/designers/language-builtin-functions/language-function-if.xml b/docs/en/designers/language-builtin-functions/language-function-if.xml
index 40cb170e..079f14fa 100644
--- a/docs/en/designers/language-builtin-functions/language-function-if.xml
+++ b/docs/en/designers/language-builtin-functions/language-function-if.xml
@@ -77,6 +77,13 @@
less than or equal
<=
+
+ ===
+
+ $a === 0
+ check for identity
+ ===
+
!
not