diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index 0041896..3dd1be9 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -1335,6 +1335,7 @@
   const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
   Opts.BCPLComment = Std.hasBCPLComments();
   Opts.C99 = Std.isC99();
+  Opts.C1X = Std.isC1X();
   Opts.CPlusPlus = Std.isCPlusPlus();
   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
   Opts.Digraphs = Std.hasDigraphs();