diff --git a/SkinHide/Utils/RefHelp.cs b/SkinHide/Utils/RefHelp.cs
index 424349b..ba73e99 100644
--- a/SkinHide/Utils/RefHelp.cs
+++ b/SkinHide/Utils/RefHelp.cs
@@ -83,12 +83,14 @@ namespace SkinHide.Utils
             {
                 ilGen.Emit(OpCodes.Ldarg, i);
 
-                if (!parameterTypes[i].IsValueType)
+                bool isvaluetype = parameterTypes[i].IsValueType;
+
+                if (!isvaluetype)
                 {
                     ilGen.Emit(OpCodes.Castclass, parameterTypes[i]);
                 }
                 // DelegateparameterTypes i == parameterTypes i
-                else if (DelegateparameterTypes[i] == typeof(object) && parameterTypes[i].IsValueType)
+                else if (DelegateparameterTypes[i] == typeof(object) && isvaluetype)
                 {
                     ilGen.Emit(OpCodes.Unbox_Any, parameterTypes[i]);
                 }