diff --git a/es2panda/binder/binder.h b/es2panda/binder/binder.h
index 7f07e686e203f76e8e12131625a62b5037b58526..45ae663186a4ec881260d39b7ffb879c3bdd491e 100644
--- a/es2panda/binder/binder.h
+++ b/es2panda/binder/binder.h
@@ -111,9 +111,9 @@ public:
     }
 
     static constexpr std::string_view FUNCTION_ARGUMENTS = "arguments";
-    static constexpr std::string_view MANDATORY_PARAM_FUNC = "=f";
-    static constexpr std::string_view MANDATORY_PARAM_NEW_TARGET = "=nt";
-    static constexpr std::string_view MANDATORY_PARAM_THIS = "=t";
+    static constexpr std::string_view MANDATORY_PARAM_FUNC = "4funcObj";
+    static constexpr std::string_view MANDATORY_PARAM_NEW_TARGET = "4newTarget";
+    static constexpr std::string_view MANDATORY_PARAM_THIS = "this";
 
     static constexpr std::string_view CJS_MANDATORY_PARAM_EXPORTS = "exports";
     static constexpr std::string_view CJS_MANDATORY_PARAM_REQUIRE = "require";
@@ -125,9 +125,9 @@ public:
     static constexpr uint32_t MANDATORY_PARAMS_NUMBER = 3;
     static constexpr uint32_t CJS_MANDATORY_PARAMS_NUMBER = 8;
 
-    static constexpr std::string_view LEXICAL_MANDATORY_PARAM_FUNC = "!f";
-    static constexpr std::string_view LEXICAL_MANDATORY_PARAM_NEW_TARGET = "!nt";
-    static constexpr std::string_view LEXICAL_MANDATORY_PARAM_THIS = "!t";
+    static constexpr std::string_view LEXICAL_MANDATORY_PARAM_FUNC = "0funcObj";
+    static constexpr std::string_view LEXICAL_MANDATORY_PARAM_NEW_TARGET = "0newTarget";
+    static constexpr std::string_view LEXICAL_MANDATORY_PARAM_THIS = "0this";
 
     static constexpr std::string_view MAIN_FUNC_NAME = "func_main_0";
     static constexpr std::string_view ANONYMOUS_FUNC_NAME = "";
diff --git a/es2panda/ir/expressions/thisExpression.cpp b/es2panda/ir/expressions/thisExpression.cpp
index 397b0bab53c3ca6331eaf1a6e26812af2fe7aef0..95b94aa69b2570d94d6e7204903dc4134ec527f5 100644
--- a/es2panda/ir/expressions/thisExpression.cpp
+++ b/es2panda/ir/expressions/thisExpression.cpp
@@ -36,7 +36,7 @@ void ThisExpression::Compile(compiler::PandaGen *pg) const
 
     ASSERT(res.variable && res.variable->IsLocalVariable());
     if (pg->isDebuggerEvaluateExpressionMode()) {
-        pg->LoadObjByNameViaDebugger(this, "this", true);
+        pg->LoadObjByNameViaDebugger(this, binder::Binder::MANDATORY_PARAM_THIS, true);
     } else {
         pg->LoadAccFromLexEnv(this, res);
     }