diff --git a/Confuser.Renamer/NameService.cs b/Confuser.Renamer/NameService.cs
index 40224a5..6ce7bae 100644
--- a/Confuser.Renamer/NameService.cs
+++ b/Confuser.Renamer/NameService.cs
@@ -220,9 +220,11 @@ namespace Confuser.Renamer {
 
 			if (mode == RenameMode.Empty)
 				return "";
-			if (mode == RenameMode.Debug)
+			if (mode == RenameMode.Debug || mode == RenameMode.Retain) {
 				// When flattening there are issues, in case there is a . in the name of the assembly.
-				return MakeGenericName("_" + name.Replace('.', '_'), count);
+				newName = MakeGenericName(name.Replace('.', '_'), count);
+				return mode == RenameMode.Debug ? "_" + newName : newName;
+			}
 			if (mode == RenameMode.Reversible) {
 				if (reversibleRenamer == null)
 					throw new ArgumentException("Password not provided for reversible renaming.");
diff --git a/Confuser.Renamer/RenameMode.cs b/Confuser.Renamer/RenameMode.cs
index 1deb56d..23a1e21 100644
--- a/Confuser.Renamer/RenameMode.cs
+++ b/Confuser.Renamer/RenameMode.cs
@@ -11,6 +11,10 @@ namespace Confuser.Renamer {
 		Sequential = 0x11,
 		Reversible = 0x12,
 
-		Debug = 0x20
+		/// <summary>Add a underscore to the name to mark that it would be renamed.</summary>
+		Debug = 0x20,
+
+		/// <summary>Keep the names as they are.</summary>
+		Retain = Int32.MaxValue
 	}
-}
\ No newline at end of file
+}
diff --git a/Tests/123_InheritCustomAttr.Test/InheritCustomAttributeTest.cs b/Tests/123_InheritCustomAttr.Test/InheritCustomAttributeTest.cs
index 6d5b815..b27c4f0 100644
--- a/Tests/123_InheritCustomAttr.Test/InheritCustomAttributeTest.cs
+++ b/Tests/123_InheritCustomAttr.Test/InheritCustomAttributeTest.cs
@@ -71,7 +71,7 @@ namespace _123_InheritCustomAttr.Test {
 		}
 
 		public static IEnumerable<object[]> InheritCustomAttributeData() {
-			foreach (var renameMode in new string[] { nameof(RenameMode.Unicode), nameof(RenameMode.ASCII), nameof(RenameMode.Letters), nameof(RenameMode.Debug) })
+			foreach (var renameMode in new string[] { nameof(RenameMode.Unicode), nameof(RenameMode.ASCII), nameof(RenameMode.Letters), nameof(RenameMode.Debug), nameof(RenameMode.Retain) })
 				foreach (var flatten in new bool[] { true, false })
 					yield return new object[] { renameMode, flatten };
 		}
diff --git a/Tests/161_DynamicTypeRename.Test/RenameDynamicMethodTest.cs b/Tests/161_DynamicTypeRename.Test/RenameDynamicMethodTest.cs
index 7858c3d..78406fa 100644
--- a/Tests/161_DynamicTypeRename.Test/RenameDynamicMethodTest.cs
+++ b/Tests/161_DynamicTypeRename.Test/RenameDynamicMethodTest.cs
@@ -71,7 +71,7 @@ namespace DynamicTypeRename.Test {
 		}
 
 		public static IEnumerable<object[]> RenameDynamicTypeData() {
-			foreach (var renameMode in new string[] { nameof(RenameMode.Unicode), nameof(RenameMode.ASCII), nameof(RenameMode.Letters), nameof(RenameMode.Debug) })
+			foreach (var renameMode in new string[] { nameof(RenameMode.Unicode), nameof(RenameMode.ASCII), nameof(RenameMode.Letters), nameof(RenameMode.Debug), nameof(RenameMode.Retain) })
 				foreach (var flatten in new bool[] { true, false })
 					yield return new object[] { renameMode, flatten };
 		}