diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index b2bd759..88c972c 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -775,6 +775,10 @@
     Res.push_back("-include");
     Res.push_back(Opts.Includes[i]);
   }
+  for (unsigned i = 0, e = Opts.Modules.size(); i != e; ++i) {
+    Res.push_back("-import_module");
+    Res.push_back(Opts.Modules[i]);
+  }
   for (unsigned i = 0, e = Opts.MacroIncludes.size(); i != e; ++i) {
     Res.push_back("-imacros");
     Res.push_back(Opts.MacroIncludes[i]);
@@ -1807,6 +1811,12 @@
     Opts.ChainedIncludes.push_back(A->getValue(Args));
   }
 
+  for (arg_iterator it = Args.filtered_begin(OPT_import_module),
+      ie = Args.filtered_end(); it != ie; ++it) {
+    const Arg *A = *it;
+    Opts.Modules.push_back(A->getValue(Args));
+  }
+
   // Include 'altivec.h' if -faltivec option present
   if (Args.hasArg(OPT_faltivec))
     Opts.Includes.push_back("altivec.h");