diff --git a/include/ast/expression/BinaryExpression.hpp b/include/ast/expression/BinaryExpression.hpp
index 01f7514..6e6c232 100644
--- a/include/ast/expression/BinaryExpression.hpp
+++ b/include/ast/expression/BinaryExpression.hpp
@@ -34,6 +34,7 @@ class BinaryExpression : public ASTNode {
     DynamicObject applyStringOp(DynamicObject& lValue, DynamicObject& rValue);
     DynamicObject applyNumOp(DynamicObject& lValue, DynamicObject& rValue);
     DynamicObject applyBoolOp(DynamicObject& lValue, DynamicObject& rValue);
+    DynamicObject applyRegexOp(DynamicObject& lValue, DynamicObject& rValue);
 
 public:
     explicit BinaryExpression(