diff --git a/libcxxabi/CMakeLists.txt b/libcxxabi/CMakeLists.txt
index 96a1c625222a898c7a5fd6172b87bbab1a094b30..10ac112c90d9ff38b672d092f0c5bab703414571 100644
--- a/libcxxabi/CMakeLists.txt
+++ b/libcxxabi/CMakeLists.txt
@@ -352,6 +352,7 @@ if (NOT LIBCXXABI_ENABLE_THREADS)
                         " is also set to ON.")
   endif()
   add_definitions(-D_LIBCXXABI_HAS_NO_THREADS)
+  add_definitions(-D_LIBCPP_HAS_NO_THREADS)
 endif()
 
 if (LIBCXXABI_HAS_EXTERNAL_THREAD_API)