diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 60ed5fd..26414f1 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -2776,6 +2776,7 @@
   }
 
   Opts.CompleteMemberPointers = Args.hasArg(OPT_fcomplete_member_pointers);
+  Opts.BuildingPCHWithObjectFile = Args.hasArg(OPT_building_pch_with_obj);
 }
 
 static bool isStrictlyPreprocessorAction(frontend::ActionKind Action) {