diff --git a/ILRuntime/Runtime/Intepreter/ILIntepreter.cs b/ILRuntime/Runtime/Intepreter/ILIntepreter.cs
index 8236b494..a9edfc87 100644
--- a/ILRuntime/Runtime/Intepreter/ILIntepreter.cs
+++ b/ILRuntime/Runtime/Intepreter/ILIntepreter.cs
@@ -4736,10 +4736,24 @@ void StLocSub(StackObject* esp, StackObject* v, int idx, IList<object> mStack)
                     if (v->ObjectType == ObjectTypes.ValueTypeObjectReference)
                     {
                         CopyStackValueType(esp, v, mStack);
+                        FreeStackValueType(esp);
+                    }
+                    else if(v->ObjectType == ObjectTypes.Object)
+                    {
+                        var dst = ILIntepreter.ResolveReference(esp);
+                        if(dst != null)
+                        {
+                            var ct = domain.GetTypeByIndex(dst->Value) as CLRType;
+                            var binder = ct.ValueTypeBinder;
+                            v->ObjectType = ObjectTypes.ValueTypeObjectReference;
+                            int addr = ((IntPtr)dst).ToInt32();
+                            v->Value = addr;
+                        }
+                        else
+                            throw new NotImplementedException();
                     }
                     else
                         throw new NotImplementedException();
-                    FreeStackValueType(esp);
                     break;
                 default:
                     *v = *esp;
diff --git a/TestCases/TestValueTypeBinding.cs b/TestCases/TestValueTypeBinding.cs
index 548f17fb..52efe223 100644
--- a/TestCases/TestValueTypeBinding.cs
+++ b/TestCases/TestValueTypeBinding.cs
@@ -477,5 +477,29 @@ public static void UnitTest_10047()
             if(Math.Abs(arr2[0].X - 1244)>0.001f)
                 throw new Exception();
         }
+
+        public static void UnitTest_10048()
+        {
+            var pos = new TestVector3(0f, 0.8f, 0.5f);
+            var obj = pos as object;
+            UnitTest_10048Sub(obj);
+        }
+
+        static void UnitTest_10048Sub(object param = null)
+        {
+            var context = new UnitTest_10048Context( param);
+            object data = context.data;
+            Console.WriteLine("data:" + data.ToString());
+        }
+
+        public class UnitTest_10048Context
+        {
+            public object data;
+
+            public UnitTest_10048Context(object data = null)
+            {
+                this.data = data;
+            }
+        }
     }
 }
\ No newline at end of file