diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index 1c9d91a..6c73865 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -1444,6 +1444,9 @@
     case Type::Decltype:
       T = cast<DecltypeType>(T)->getUnderlyingType();
       break;
+    case Type::UnaryTransform:
+      T = cast<UnaryTransformType>(T)->getUnderlyingType();
+      break;
     case Type::Attributed:
       T = cast<AttributedType>(T)->getEquivalentType();
       break;
@@ -1559,6 +1562,7 @@
   case Type::TypeOfExpr:
   case Type::TypeOf:
   case Type::Decltype:
+  case Type::UnaryTransform:
   case Type::Auto:
     llvm_unreachable("type should have been unwrapped!");
     return llvm::DIType();