diff --git a/libcxx/include/CMakeLists.txt b/libcxx/include/CMakeLists.txt
--- a/libcxx/include/CMakeLists.txt
+++ b/libcxx/include/CMakeLists.txt
@@ -383,7 +383,6 @@
   queue
   random
   ranges
-  ranges
   ratio
   regex
   scoped_allocator