diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -649,12 +649,7 @@
              "remove current directory from include path">;
 def I : JoinedOrSeparate<["-"], "I">, Group<I_Group>,
     Flags<[CC1Option,CC1AsOption]>, MetaVarName<"<dir>">,
-    HelpText<"Add directory to include search path. If there are multiple -I "
-             "options, these directories are searched in the order they are "
-             "given before the standard system directories are searched. "
-             "If the same directory is in the SYSTEM include search paths, for "
-             "example if also specified with -isystem, the -I option will be "
-             "ignored">;
+    HelpText<"Add directory to include search path">;
 def L : JoinedOrSeparate<["-"], "L">, Flags<[RenderJoined]>, Group<Link_Group>,
     MetaVarName<"<dir>">, HelpText<"Add directory to library search path">;
 def MD : Flag<["-"], "MD">, Group<M_Group>,