diff --git a/include/clang/Driver/CC1Options.td b/include/clang/Driver/CC1Options.td
index 65326c6..ab2d5dc 100644
--- a/include/clang/Driver/CC1Options.td
+++ b/include/clang/Driver/CC1Options.td
@@ -184,6 +184,8 @@
   HelpText<"Limit float precision to the given value">;
 def mno_exec_stack : Flag<["-"], "mnoexecstack">,
   HelpText<"Mark the file as not needing an executable stack">;
+def split_stacks : Flag<["-"], "split-stacks">,
+  HelpText<"Try to use a split stack if possible.">;
 def mno_zero_initialized_in_bss : Flag<["-"], "mno-zero-initialized-in-bss">,
   HelpText<"Do not put zero initialized data in the BSS">;
 def backend_option : Separate<["-"], "backend-option">,