diff --git a/ICSharpCode.Decompiler/CSharp/Syntax/TypeSystemAstBuilder.cs b/ICSharpCode.Decompiler/CSharp/Syntax/TypeSystemAstBuilder.cs
index 7752d667e..2c13f6f56 100644
--- a/ICSharpCode.Decompiler/CSharp/Syntax/TypeSystemAstBuilder.cs
+++ b/ICSharpCode.Decompiler/CSharp/Syntax/TypeSystemAstBuilder.cs
@@ -739,7 +739,7 @@ namespace ICSharpCode.Decompiler.CSharp.Syntax
 			if (type == null)
 				throw new ArgumentNullException("type");
 			if (constantValue == null) {
-				if (type.IsReferenceType == true) {
+				if (type.IsReferenceType == true || type.IsKnownType(KnownTypeCode.NullableOfT)) {
 					var expr = new NullReferenceExpression();
 					if (AddResolveResultAnnotations)
 						expr.AddAnnotation(new ConstantResolveResult(SpecialType.NullType, null));