diff --git a/src/Generator/Generators/QuickJS/QuickJSMarshal.cs b/src/Generator/Generators/QuickJS/QuickJSMarshal.cs
index 80d921125..02b109470 100644
--- a/src/Generator/Generators/QuickJS/QuickJSMarshal.cs
+++ b/src/Generator/Generators/QuickJS/QuickJSMarshal.cs
@@ -562,13 +562,13 @@ public bool VisitPrimitiveType(PrimitiveType primitive)
                     return true;
 
                 case PrimitiveType.LongLong:
-                    Context.Before.WriteLine($"if (JS_ToBigInt64(ctx, (int64_t*)&_{argName}, argv[{Context.ParameterIndex}]))");
+                    Context.Before.WriteLine($"if (JS_ToBigInt64(ctx, (int64_t*)&{argName}, argv[{Context.ParameterIndex}]))");
                     Context.Before.WriteLineIndent("return JS_EXCEPTION;");
                     Context.Return.Write($"{argName}");
                     return true;
 
                 case PrimitiveType.ULongLong:
-                    Context.Before.WriteLine($"if (JS_ToBigUint64(ctx, (int64_t*)&{argName}, argv[{Context.ParameterIndex}]))");
+                    Context.Before.WriteLine($"if (JS_ToBigUint64(ctx, (uint64_t*)&{argName}, argv[{Context.ParameterIndex}]))");
                     Context.Before.WriteLineIndent("return JS_EXCEPTION;");
                     Context.Return.Write($"{argName}");
                     return true;
diff --git a/tests/quickjs/premake5.lua b/tests/quickjs/premake5.lua
index 45f408c1c..23025ff2d 100644
--- a/tests/quickjs/premake5.lua
+++ b/tests/quickjs/premake5.lua
@@ -9,6 +9,7 @@ workspace "qjs"
     project "test"
         kind "SharedLib"
         language "C++"
+        cppdialect "C++11"
         files
         {
             "gen/**.cpp",