diff --git a/include/clang/Driver/CC1Options.td b/include/clang/Driver/CC1Options.td
index c0fb23d..e103b5b 100644
--- a/include/clang/Driver/CC1Options.td
+++ b/include/clang/Driver/CC1Options.td
@@ -110,6 +110,8 @@
   HelpText<"Do not emit code that uses the red zone.">;
 def dwarf_debug_flags : Separate<"-dwarf-debug-flags">,
   HelpText<"The string to embed in the Dwarf debug flags record.">;
+def fforbid_guard_variables : Flag<"-fforbid-guard-variables">,
+  HelpText<"Emit an error if a C++ static local initializer would need a guard variable">;
 def g : Flag<"-g">, HelpText<"Generate source level debug information">;
 def fcatch_undefined_behavior : Flag<"-fcatch-undefined-behavior">,
     HelpText<"Generate runtime checks for undefined behavior.">;