diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index efffd30..39588e8 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -957,7 +957,7 @@
 
 bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
                                 DiagnosticsEngine *Diags,
-                                bool DefaultDiagColor) {
+                                bool DefaultDiagColor, bool DefaultShowOpt) {
   using namespace options;
   bool Success = true;
 
@@ -977,7 +977,9 @@
   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
   Opts.AbsolutePath = Args.hasArg(OPT_fdiagnostics_absolute_paths);
-  Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
+  Opts.ShowOptionNames =
+      Args.hasFlag(OPT_fdiagnostics_show_option,
+                   OPT_fno_diagnostics_show_option, DefaultShowOpt);
 
   llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
 
@@ -2404,8 +2406,9 @@
   Success &= ParseAnalyzerArgs(*Res.getAnalyzerOpts(), Args, Diags);
   Success &= ParseMigratorArgs(Res.getMigratorOpts(), Args);
   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), Args);
-  Success &= ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags,
-                                 false /*DefaultDiagColor*/);
+  Success &=
+      ParseDiagnosticArgs(Res.getDiagnosticOpts(), Args, &Diags,
+                          false /*DefaultDiagColor*/, false /*DefaultShowOpt*/);
   ParseCommentArgs(LangOpts.CommentOpts, Args);
   ParseFileSystemArgs(Res.getFileSystemOpts(), Args);
   // FIXME: We shouldn't have to pass the DashX option around here