diff --git a/src/libraries/System.Reflection.MetadataLoadContext/src/System/Reflection/TypeLoading/Constructors/RoDefinitionConstructor.cs b/src/libraries/System.Reflection.MetadataLoadContext/src/System/Reflection/TypeLoading/Constructors/RoDefinitionConstructor.cs
index db47928f2f4e4..0540422a9920e 100644
--- a/src/libraries/System.Reflection.MetadataLoadContext/src/System/Reflection/TypeLoading/Constructors/RoDefinitionConstructor.cs
+++ b/src/libraries/System.Reflection.MetadataLoadContext/src/System/Reflection/TypeLoading/Constructors/RoDefinitionConstructor.cs
@@ -13,7 +13,7 @@ namespace System.Reflection.TypeLoading
     internal sealed class RoDefinitionConstructor<TMethodDecoder> : RoConstructor where TMethodDecoder : IMethodDecoder
     {
         private readonly RoInstantiationProviderType _declaringType;
-        private readonly TMethodDecoder _decoder;
+        private TMethodDecoder _decoder;
 
         internal RoDefinitionConstructor(RoInstantiationProviderType declaringType, TMethodDecoder decoder)
             : base()
diff --git a/src/libraries/System.Reflection.MetadataLoadContext/src/System/Reflection/TypeLoading/Methods/RoDefinitionMethod.cs b/src/libraries/System.Reflection.MetadataLoadContext/src/System/Reflection/TypeLoading/Methods/RoDefinitionMethod.cs
index 3a2a82883f52f..a8589591cabf6 100644
--- a/src/libraries/System.Reflection.MetadataLoadContext/src/System/Reflection/TypeLoading/Methods/RoDefinitionMethod.cs
+++ b/src/libraries/System.Reflection.MetadataLoadContext/src/System/Reflection/TypeLoading/Methods/RoDefinitionMethod.cs
@@ -31,7 +31,7 @@ protected RoDefinitionMethod(Type reflectedType)
     internal sealed partial class RoDefinitionMethod<TMethodDecoder> : RoDefinitionMethod where TMethodDecoder : IMethodDecoder
     {
         private readonly RoInstantiationProviderType _declaringType;
-        private readonly TMethodDecoder _decoder;
+        private TMethodDecoder _decoder;
 
         internal RoDefinitionMethod(RoInstantiationProviderType declaringType, Type reflectedType, TMethodDecoder decoder)
             : base(reflectedType)