diff --git a/include/__mutex_base b/include/__mutex_base
index d5ece7c14..c78be2472 100644
--- a/include/__mutex_base
+++ b/include/__mutex_base
@@ -14,7 +14,9 @@
 #include <__config>
 #include <chrono>
 #include <system_error>
+#ifndef _LIBCPP_HAS_NO_THREADS
 #include <pthread.h>
+#endif
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #pragma GCC system_header
diff --git a/include/mutex b/include/mutex
index 373d75b09..a0875a568 100644
--- a/include/mutex
+++ b/include/mutex
@@ -179,7 +179,9 @@ template<class Callable, class ...Args>
 #ifndef _LIBCPP_HAS_NO_VARIADICS
 #include <tuple>
 #endif
+#ifndef _LIBCPP_HAS_NO_THREADS
 #include <sched.h>
+#endif
 
 #include <__undef_min_max>