Update the help text.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191554 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Driver/CC1Options.td b/include/clang/Driver/CC1Options.td
index d4122b2..c040598 100644
--- a/include/clang/Driver/CC1Options.td
+++ b/include/clang/Driver/CC1Options.td
@@ -419,7 +419,7 @@
 def fobjc_dispatch_method_EQ : Joined<["-"], "fobjc-dispatch-method=">,
   HelpText<"Objective-C dispatch method to use">;
 def disable_objc_default_synthesize_properties : Flag<["-"], "disable-objc-default-synthesize-properties">,
-  HelpText<"enable the default synthesis of Objective-C properties">;
+  HelpText<"disable the default synthesis of Objective-C properties">;
 def fencode_extended_block_signature : Flag<["-"], "fencode-extended-block-signature">,
   HelpText<"enable extended encoding of block type signature">;
 def pic_level : Separate<["-"], "pic-level">,