diff --git a/unity/Assets/core/upm/Editor/Resources/puerts/xil2cpp/Puerts_il2cpp.cpp.txt b/unity/Assets/core/upm/Editor/Resources/puerts/xil2cpp/Puerts_il2cpp.cpp.txt
index f0ab900d53..9f9cbbe06e 100644
--- a/unity/Assets/core/upm/Editor/Resources/puerts/xil2cpp/Puerts_il2cpp.cpp.txt
+++ b/unity/Assets/core/upm/Editor/Resources/puerts/xil2cpp/Puerts_il2cpp.cpp.txt
@@ -122,6 +122,7 @@ static Il2CppClass *g_typeofTypedValue;
 static MethodInfoHelper<Il2CppArray*(Il2CppString*)> g_ExtensionMethodGetHelper;
 
 static Il2CppClass* s_ParamArrayAttribute;
+static Il2CppClass* s_ExtensionAttribute;
 
 static bool RegisterType(Il2CppClass* klass);
 static bool ClassNotFoundCallback(const void* typeId)
@@ -395,7 +396,6 @@ static bool IsCCtor(const MethodInfo* method)
 
 static bool IsExtensionMethod(const MethodInfo* method)
 {
-    static Il2CppClass* s_ExtensionAttribute = Class::FromName(il2cpp_defaults.corlib, "System.Runtime.CompilerServices", "ExtensionAttribute");
     return Method::HasAttribute(method, s_ExtensionAttribute);
 }
 
@@ -2728,6 +2728,7 @@ void InitialPuerts(pesapi_func_ptr* func_array)
     pesapi_init(func_array);
     
     puerts::s_ParamArrayAttribute = Class::FromName(il2cpp_defaults.corlib, "System", "ParamArrayAttribute");
+    puerts::s_ExtensionAttribute = Class::FromName(il2cpp_defaults.corlib, "System.Runtime.CompilerServices", "ExtensionAttribute");
 }
 
 void AddPendingKillScriptObjects(struct pesapi_ffi* apis, puerts::JsEnvPrivate* jsEnvPrivate, pesapi_value_ref valueRef)