diff --git a/CapnpC.CSharp.Generator.Tests/Embedded Resources/UnitTest12.capnp.bin b/CapnpC.CSharp.Generator.Tests/Embedded Resources/UnitTest12.capnp.bin
new file mode 100644
index 0000000..988e7d0
Binary files /dev/null and b/CapnpC.CSharp.Generator.Tests/Embedded Resources/UnitTest12.capnp.bin differ
diff --git a/CapnpC.CSharp.Generator.Tests/No Resources/UnitTest12.capnp b/CapnpC.CSharp.Generator.Tests/No Resources/UnitTest12.capnp
new file mode 100644
index 0000000..c687260
--- /dev/null
+++ b/CapnpC.CSharp.Generator.Tests/No Resources/UnitTest12.capnp	
@@ -0,0 +1,17 @@
+@0xb7069c462537ddd6;
+
+enum TestEnum {
+    a @0;
+    b @1;
+}
+
+const globalConstant: TestEnum = b;
+
+struct Struct {
+    const structConstant: TestEnum = a;
+
+    union {
+        enumValue @0: TestEnum;
+        intValue @1: Int64;
+    }
+}
diff --git a/CapnpC.CSharp.Generator/CodeGen/DomainClassSnippetGen.cs b/CapnpC.CSharp.Generator/CodeGen/DomainClassSnippetGen.cs
index fb41086..a255b84 100644
--- a/CapnpC.CSharp.Generator/CodeGen/DomainClassSnippetGen.cs
+++ b/CapnpC.CSharp.Generator/CodeGen/DomainClassSnippetGen.cs
@@ -343,10 +343,9 @@ namespace CapnpC.CSharp.Generator.CodeGen
                         return LiteralExpression(SyntaxKind.FalseLiteralExpression);
 
                     case TypeTag.Enum:
-                        return MemberAccessExpression(
-                            SyntaxKind.SimpleMemberAccessExpression,
+                        return CastExpression(
                             _names.MakeTypeSyntax(field.Type, field.DeclaringType, TypeUsage.NotRelevant),
-                            _names.UnionDiscriminatorUndefined.IdentifierName);
+                            LiteralExpression(SyntaxKind.NumericLiteralExpression, Literal(0)));
 
                     case TypeTag.F32:
                         return LiteralExpression(SyntaxKind.NumericLiteralExpression, Literal(0.0f));