diff --git a/de4dot.code/renamer/MemberRefs.cs b/de4dot.code/renamer/MemberRefs.cs
index f2f16bff..21297f15 100644
--- a/de4dot.code/renamer/MemberRefs.cs
+++ b/de4dot.code/renamer/MemberRefs.cs
@@ -422,7 +422,7 @@ namespace de4dot.renamer {
 			case TypeAttributes.NestedFamORAssem:
 				return NestingType.isGlobalType();
 			default:
-				throw new ApplicationException(string.Format("Unknown nested type visibility mask: {0}", mask));
+				return false;
 			}
 		}