diff --git a/src/mono/netcore/System.Private.CoreLib/src/System/Reflection/Emit/EnumBuilder.Mono.cs b/src/mono/netcore/System.Private.CoreLib/src/System/Reflection/Emit/EnumBuilder.Mono.cs
index 961ea6ad69c38..a8702782ff19d 100644
--- a/src/mono/netcore/System.Private.CoreLib/src/System/Reflection/Emit/EnumBuilder.Mono.cs
+++ b/src/mono/netcore/System.Private.CoreLib/src/System/Reflection/Emit/EnumBuilder.Mono.cs
@@ -57,7 +57,7 @@ internal EnumBuilder (ModuleBuilder mb, string name, TypeAttributes visibility,
 				typeof(Enum), null, PackingSize.Unspecified, 0, null);
 			_underlyingType = underlyingType;
 			_underlyingField = _tb.DefineField ("value__", underlyingType,
-				(FieldAttributes.SpecialName | FieldAttributes.Private | FieldAttributes.RTSpecialName));
+				FieldAttributes.Public | FieldAttributes.SpecialName | FieldAttributes.RTSpecialName);
 			setup_enum_type (_tb);
 		}
 
diff --git a/src/mono/netcore/System.Private.CoreLib/src/System/Reflection/Emit/FieldBuilder.Mono.cs b/src/mono/netcore/System.Private.CoreLib/src/System/Reflection/Emit/FieldBuilder.Mono.cs
index a16592e68a76b..2e9143f2e2c26 100644
--- a/src/mono/netcore/System.Private.CoreLib/src/System/Reflection/Emit/FieldBuilder.Mono.cs
+++ b/src/mono/netcore/System.Private.CoreLib/src/System/Reflection/Emit/FieldBuilder.Mono.cs
@@ -64,7 +64,7 @@ internal FieldBuilder (TypeBuilder tb, string fieldName, Type type, FieldAttribu
 			if (type == null)
 				throw new ArgumentNullException ("type");
 
-			attrs = attributes;
+			attrs = attributes & ~FieldAttributes.ReservedMask;
 			name = fieldName;
 			this.type = type;
 			this.modReq = modReq;