diff --git a/clang/lib/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index a7b7114..97b9266 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -510,7 +510,8 @@
       PP, ModuleCache, &Context, PCHContainerRdr, Extensions,
       Sysroot.empty() ? "" : Sysroot.data(), DisablePCHValidation,
       AllowPCHWithCompilerErrors, /*AllowConfigurationMismatch*/ false,
-      HSOpts.ModulesValidateSystemHeaders, UseGlobalModuleIndex));
+      HSOpts.ModulesValidateSystemHeaders, HSOpts.ValidateASTInputFilesContent,
+      UseGlobalModuleIndex));
 
   // We need the external source to be set up before we read the AST, because
   // eagerly-deserialized declarations may use it.
@@ -1492,6 +1493,7 @@
         /*AllowASTWithCompilerErrors=*/false,
         /*AllowConfigurationMismatch=*/false,
         HSOpts.ModulesValidateSystemHeaders,
+        HSOpts.ValidateASTInputFilesContent,
         getFrontendOpts().UseGlobalModuleIndex, std::move(ReadTimer));
     if (hasASTConsumer()) {
       ModuleManager->setDeserializationListener(
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 59e2301..a434002 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -2079,6 +2079,8 @@
       getLastArgUInt64Value(Args, OPT_fbuild_session_timestamp, 0);
   Opts.ModulesValidateSystemHeaders =
       Args.hasArg(OPT_fmodules_validate_system_headers);
+  Opts.ValidateASTInputFilesContent =
+      Args.hasArg(OPT_fvalidate_ast_input_files_content);
   if (const Arg *A = Args.getLastArg(OPT_fmodule_format_EQ))
     Opts.ModuleFormat = A->getValue();