diff --git a/ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/OperatorDeclaration.cs b/ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/OperatorDeclaration.cs
index aa0e51c549..00ac26169f 100644
--- a/ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/OperatorDeclaration.cs
+++ b/ICSharpCode.NRefactory.CSharp/Ast/TypeMembers/OperatorDeclaration.cs
@@ -165,8 +165,10 @@ namespace ICSharpCode.NRefactory.CSharp
 				return FalseRole;
 			
 			case OperatorType.Addition:
+			case OperatorType.UnaryPlus:
 				return AdditionRole;
 			case OperatorType.Subtraction:
+			case OperatorType.UnaryNegation:
 				return SubtractionRole;
 			
 			case OperatorType.Multiply: