diff --git a/clang/lib/Frontend/ASTUnit.cpp b/clang/lib/Frontend/ASTUnit.cpp
index 8742a54..19fafa3 100644
--- a/clang/lib/Frontend/ASTUnit.cpp
+++ b/clang/lib/Frontend/ASTUnit.cpp
@@ -2776,7 +2776,8 @@
 static bool PCHLocator(serialization::ModuleFile &M, void *UserData) {
   PCHLocatorInfo &Info = *static_cast<PCHLocatorInfo*>(UserData);
   switch (M.Kind) {
-  case serialization::MK_Module:
+  case serialization::MK_ImplicitModule:
+  case serialization::MK_ExplicitModule:
     return true; // skip dependencies.
   case serialization::MK_PCH:
     Info.Mod = &M;