diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 2d5e1bc55dd1..5846c1b5f310 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -134,6 +134,7 @@ def ccc_ : Joined<"-ccc-">, Group<ccc_Group>, Flags<[Unsupported]>;
 
 def _HASH_HASH_HASH : Flag<"-###">, Flags<[DriverOption]>,
     HelpText<"Print the commands to run for this compilation">;
+def _DASH_DASH : Flag<"--">, Flags<[DriverOption]>;
 def A : JoinedOrSeparate<"-A">;
 def B : JoinedOrSeparate<"-B">;
 def CC : Flag<"-CC">;