diff --git a/clang/lib/Serialization/ModuleManager.cpp b/clang/lib/Serialization/ModuleManager.cpp
index 18fe035..20249e0 100644
--- a/clang/lib/Serialization/ModuleManager.cpp
+++ b/clang/lib/Serialization/ModuleManager.cpp
@@ -89,7 +89,7 @@
     ModuleEntry = New;
 
     New->InputFilesValidationTimestamp = 0;
-    if (New->Kind == MK_Module) {
+    if (New->Kind == MK_ImplicitModule) {
       std::string TimestampFilename = New->getTimestampFilename();
       vfs::Status Status;
       // A cached stat value would be fine as well.