diff --git a/ICSharpCode.NRefactory/Semantics/Conversion.cs b/ICSharpCode.NRefactory/Semantics/Conversion.cs
index 0648171108..fc5889d55f 100644
--- a/ICSharpCode.NRefactory/Semantics/Conversion.cs
+++ b/ICSharpCode.NRefactory/Semantics/Conversion.cs
@@ -189,6 +189,10 @@ namespace ICSharpCode.NRefactory.Semantics
 				get { return type == 1; }
 			}
 			
+			public override bool IsConstantExpressionConversion {
+				get { return type == 2; }
+			}
+
 			public override bool IsReferenceConversion {
 				get { return type == 3; }
 			}
@@ -373,6 +377,10 @@ namespace ICSharpCode.NRefactory.Semantics
 			get { return false; }
 		}
 		
+		public virtual bool IsConstantExpressionConversion {
+			get { return false; }
+		}
+
 		public virtual bool IsNumericConversion {
 			get { return false; }
 		}