diff --git a/ICSharpCode.Decompiler/DebugInfo/KnownGuids.cs b/ICSharpCode.Decompiler/DebugInfo/KnownGuids.cs
index 392b3ca0b..353b49acf 100644
--- a/ICSharpCode.Decompiler/DebugInfo/KnownGuids.cs
+++ b/ICSharpCode.Decompiler/DebugInfo/KnownGuids.cs
@@ -21,6 +21,7 @@ namespace ICSharpCode.Decompiler.DebugInfo
 		public static readonly Guid CompilationOptions = new Guid("B5FEEC05-8CD0-4A83-96DA-466284BB4BD8");
 		public static readonly Guid CompilationMetadataReferences = new Guid("7E4D4708-096E-4C5C-AEDA-CB10BA6A740D");
 		public static readonly Guid TupleElementNames = new Guid("ED9FDF71-8879-4747-8ED3-FE5EDE3CE710");
+		public static readonly Guid TypeDefinitionDocuments = new Guid("932E74BC-DBA9-4478-8D46-0F32A7BAB3D3");
 
 		public static readonly Guid HashAlgorithmSHA1 = new Guid("ff1816ec-aa5e-4d10-87f7-6f4963833460");
 		public static readonly Guid HashAlgorithmSHA256 = new Guid("8829d00f-11b8-4213-878b-770e8597ac16");
diff --git a/ILSpy/Metadata/DebugTables/CustomDebugInformationTableTreeNode.cs b/ILSpy/Metadata/DebugTables/CustomDebugInformationTableTreeNode.cs
index 44853e608..372a744b7 100644
--- a/ILSpy/Metadata/DebugTables/CustomDebugInformationTableTreeNode.cs
+++ b/ILSpy/Metadata/DebugTables/CustomDebugInformationTableTreeNode.cs
@@ -125,7 +125,8 @@ namespace ICSharpCode.ILSpy.Metadata
 				MethodSteppingInformation,
 				CompilationOptions,
 				CompilationMetadataReferences,
-				TupleElementNames
+				TupleElementNames,
+				TypeDefinitionDocuments
 			}
 
 			static CustomDebugInformationKind GetKind(MetadataReader metadata, GuidHandle h)
@@ -177,6 +178,10 @@ namespace ICSharpCode.ILSpy.Metadata
 				{
 					return CustomDebugInformationKind.TupleElementNames;
 				}
+				if (KnownGuids.TypeDefinitionDocuments == guid)
+				{
+					return CustomDebugInformationKind.TypeDefinitionDocuments;
+				}
 
 				return CustomDebugInformationKind.Unknown;
 			}
@@ -251,6 +256,9 @@ namespace ICSharpCode.ILSpy.Metadata
 						case CustomDebugInformationKind.TupleElementNames:
 							kindString = $"{MetadataTokens.GetHeapOffset(debugInfo.Kind):X8} - Tuple Element Names (C#) [{ guid}]";
 							break;
+						case CustomDebugInformationKind.TypeDefinitionDocuments:
+							kindString = $"{MetadataTokens.GetHeapOffset(debugInfo.Kind):X8} - Type Definition Documents (C# / VB) [{ guid}]";
+							break;
 						default:
 							kindString = $"{MetadataTokens.GetHeapOffset(debugInfo.Kind):X8} - Unknown [{guid}]";
 							break;