diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index abfabbb..eca6413 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -562,6 +562,7 @@
   Args.AddLastArg(CmdArgs, options::OPT_dD);
 
   Args.AddAllArgValues(CmdArgs, options::OPT_Xclang);
+  Args.AddAllArgValues(CmdArgs, options::OPT_mllvm);
 
   if (Output.getType() == types::TY_Dependencies) {
     // Handled with other dependency code.