diff --git a/capnpc-csharp.tests/Properties/Resources.Designer.cs b/capnpc-csharp.tests/Properties/Resources.Designer.cs
index ad396a7..65b57b9 100644
--- a/capnpc-csharp.tests/Properties/Resources.Designer.cs
+++ b/capnpc-csharp.tests/Properties/Resources.Designer.cs
@@ -90,6 +90,16 @@ namespace capnpc_csharp.Tests.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized resource of type System.Byte[].
+        /// </summary>
+        internal static byte[] UnitTest20_capnp {
+            get {
+                object obj = ResourceManager.GetObject("UnitTest20_capnp", resourceCulture);
+                return ((byte[])(obj));
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized resource of type System.Byte[].
         /// </summary>
diff --git a/capnpc-csharp.tests/Properties/Resources.resx b/capnpc-csharp.tests/Properties/Resources.resx
index 43736d8..5c256ea 100644
--- a/capnpc-csharp.tests/Properties/Resources.resx
+++ b/capnpc-csharp.tests/Properties/Resources.resx
@@ -121,6 +121,9 @@
   <data name="UnitTest10_capnp" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Resources\UnitTest10.capnp.bin;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </data>
+  <data name="UnitTest20_capnp" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\UnitTest20.capnp.bin;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </data>
   <data name="UnitTest3_capnp" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Resources\UnitTest3.capnp.bin;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </data>
diff --git a/capnpc-csharp.tests/Resources/UnitTest20.capnp.bin b/capnpc-csharp.tests/Resources/UnitTest20.capnp.bin
new file mode 100644
index 0000000..48f5e96
Binary files /dev/null and b/capnpc-csharp.tests/Resources/UnitTest20.capnp.bin differ
diff --git a/capnpc-csharp.tests/UnitTest20.capnp b/capnpc-csharp.tests/UnitTest20.capnp
new file mode 100644
index 0000000..edf91c9
--- /dev/null
+++ b/capnpc-csharp.tests/UnitTest20.capnp
@@ -0,0 +1,5 @@
+@0xcebb7a61a86a7492;
+
+annotation anAnnotation(file): Text;
+
+const aConstant :UInt16 = 42;
diff --git a/capnpc-csharp.tests/UnitTests.cs b/capnpc-csharp.tests/UnitTests.cs
index 26389b7..4c2966b 100644
--- a/capnpc-csharp.tests/UnitTests.cs
+++ b/capnpc-csharp.tests/UnitTests.cs
@@ -71,6 +71,15 @@ namespace CapnpC
             Assert.AreEqual($"{innerNSStr}.Inner", innerNameSyntax.ToString());
         }
 
+        [TestMethod]
+        public void Test20AnnotationAndConst()
+        {
+            var model = Load(Resources.UnitTest20_capnp);
+            var codeGen = NewGeneratorFor(model);
+            codeGen.Transform(model.FilesToGenerate.First());
+            // Should not throw 
+        }
+
         static Generator.CodeGenerator NewGeneratorFor(Model.SchemaModel model)
             => new Generator.CodeGenerator(model, new Generator.GeneratorOptions());