diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 70597ab..8d82318 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -945,6 +945,10 @@
   if (!Args.hasFlag(options::OPT_fbuiltin, options::OPT_fno_builtin))
     CmdArgs.push_back("-fno-builtin");
 
+  if (!Args.hasFlag(options::OPT_fassume_sane_operator_new,
+                    options::OPT_fno_assume_sane_operator_new))
+    CmdArgs.push_back("-fno-assume-sane-operator-new");
+
   // -fblocks=0 is default.
   if (Args.hasFlag(options::OPT_fblocks, options::OPT_fno_blocks,
                    getToolChain().IsBlocksDefault())) {