diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -4544,7 +4544,10 @@
         return CreateFromArgsImpl(Invocation, CommandLineArgs, Diags, Argv0);
       },
       [](CompilerInvocation &Invocation, SmallVectorImpl<const char *> &Args,
-         StringAllocator SA) { Invocation.generateCC1CommandLine(Args, SA); },
+         StringAllocator SA) {
+        Args.push_back("-cc1");
+        Invocation.generateCC1CommandLine(Args, SA);
+      },
       Invocation, DummyInvocation, CommandLineArgs, Diags, Argv0);
 }