diff --git a/lib/AST/Type.cpp b/lib/AST/Type.cpp
index bb9f57b..0922538 100644
--- a/lib/AST/Type.cpp
+++ b/lib/AST/Type.cpp
@@ -628,6 +628,7 @@
   case TypeOfExpr:
   case TypeOf:
   case TemplateTypeParm:
+  case SubstTemplateTypeParm:
   case TemplateSpecialization:
   case QualifiedName:
   case Typename:
@@ -1267,6 +1268,10 @@
     InnerString = Name->getName() + InnerString;
 }
 
+void SubstTemplateTypeParmType::getAsStringInternal(std::string &InnerString, const PrintingPolicy &Policy) const {
+  getReplacementType().getAsStringInternal(InnerString, Policy);
+}
+
 std::string
 TemplateSpecializationType::PrintTemplateArgumentList(
                                                   const TemplateArgument *Args,