--- a/js/src/threading/Thread.h
+++ b/js/src/threading/Thread.h
@@ -5,17 +5,16 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #ifndef threading_Thread_h
 #define threading_Thread_h
 
 #include "mozilla/Atomics.h"
 #include "mozilla/Attributes.h"
 #include "mozilla/HashFunctions.h"
-#include "mozilla/IndexSequence.h"
 #include "mozilla/TimeStamp.h"
 #include "mozilla/Tuple.h"
 
 #include <stdint.h>
 
 #include "jsutil.h"
 
 #include "threading/LockGuard.h"
@@ -233,17 +232,17 @@ public:
   static THREAD_RETURN_TYPE THREAD_CALL_API Start(void* aPack) {
     auto* pack = static_cast<ThreadTrampoline<F, Args...>*>(aPack);
     pack->callMain(typename mozilla::IndexSequenceFor<Args...>::Type());
     js_delete(pack);
     return 0;
   }
 
   template<size_t ...Indices>
-  void callMain(mozilla::IndexSequence<Indices...>) {
+  void callMain(std::index_sequence<Indices...>) {
     f(mozilla::Get<Indices>(args)...);
   }
 };
 
 } // namespace detail
 } // namespace js
 
 #undef THREAD_RETURN_TYPE