diff --git a/docs/codeql/codeql-language-guides/abstract-syntax-tree-classes-for-working-with-ruby-programs.rst b/docs/codeql/codeql-language-guides/abstract-syntax-tree-classes-for-working-with-ruby-programs.rst
index 8b64a82fbc7..f36771fa0c4 100644
--- a/docs/codeql/codeql-language-guides/abstract-syntax-tree-classes-for-working-with-ruby-programs.rst
+++ b/docs/codeql/codeql-language-guides/abstract-syntax-tree-classes-for-working-with-ruby-programs.rst
@@ -222,6 +222,8 @@ All classes in this subsection are subclasses of BinaryOperation_.
 +------------------------+--------------------------+----------------------------+-------------------+
 | Expr_ ``-`` Expr_      | SubExpr_                 | BinaryArithmeticOperation_ |                   |
 +------------------------+--------------------------+----------------------------+-------------------+
+| LhsExpr_ ``=`` Expr_   | AssignExpr_              | Assignment_                |                   |
++------------------------+--------------------------+----------------------------+-------------------+
 
 Literals
 ~~~~~~~~