diff --git a/CMakeLists.txt b/CMakeLists.txt
index 63971313c..c25b48f9f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -310,6 +310,7 @@ add_definitions(-D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 add_compile_flags_if_supported(
     -Wall -W -Wwrite-strings
     -Wno-unused-parameter -Wno-long-long -Wno-user-defined-literals
+    -Wno-covered-switch-default
     -Werror=return-type)
 if (LIBCXX_ENABLE_WERROR)
   add_compile_flags_if_supported(-Werror)