Index: clang/include/clang/AST/PropertiesBase.td
===================================================================
--- clang/include/clang/AST/PropertiesBase.td
+++ clang/include/clang/AST/PropertiesBase.td
@@ -798,8 +798,11 @@
   def : Property<"type", QualType> {
     let Read = [{ node.getUncommonValueType() }];
   }
+  def : Property<"isDefaulted", Bool> {
+    let Read = [{ node.getIsDefaulted() }];
+  }
   def : Creator<[{
-    return TemplateArgument(ctx, type, value);
+    return TemplateArgument(ctx, type, value, isDefaulted);
   }]>;
 }
 let Class = PropertyTypeCase<TemplateArgument, "Template"> in {