diff --git a/ICSharpCode.Decompiler/CSharp/Resolver/CSharpResolver.cs b/ICSharpCode.Decompiler/CSharp/Resolver/CSharpResolver.cs
index d60724bcd..3a5f1252b 100644
--- a/ICSharpCode.Decompiler/CSharp/Resolver/CSharpResolver.cs
+++ b/ICSharpCode.Decompiler/CSharp/Resolver/CSharpResolver.cs
@@ -805,7 +805,7 @@ namespace ICSharpCode.Decompiler.CSharp.Resolver
 					}
 					if (op == BinaryOperatorType.Equality || op == BinaryOperatorType.InEquality)
 					{
-						if (lhsType.IsReferenceType == true && rhsType.IsReferenceType == true && rhsType.Kind != TypeKind.Null
+						if (lhsType.IsReferenceType == true && rhsType.IsReferenceType == true && lhsType.Kind != TypeKind.Null && rhsType.Kind != TypeKind.Null
 							&& (conversions.IdentityConversion(lhsType, rhsType)
 								|| conversions.ExplicitConversion(lhsType, rhsType).IsReferenceConversion
 								|| conversions.ExplicitConversion(rhsType, lhsType).IsReferenceConversion))