diff --git a/lib/Frontend/FrontendAction.cpp b/lib/Frontend/FrontendAction.cpp
index dbbf69c..9efa8c6 100644
--- a/lib/Frontend/FrontendAction.cpp
+++ b/lib/Frontend/FrontendAction.cpp
@@ -118,7 +118,8 @@
     if (!CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
       assert(hasPCHSupport() && "This action does not have PCH support!");
       CI.createPCHExternalASTSource(
-        CI.getPreprocessorOpts().ImplicitPCHInclude);
+                                CI.getPreprocessorOpts().ImplicitPCHInclude,
+                                CI.getPreprocessorOpts().DisablePCHValidation);
       if (!CI.getASTContext().getExternalSource())
         goto failure;
     }