diff --git a/cmake/Modules/CheckLibcxxAtomic.cmake b/cmake/Modules/CheckLibcxxAtomic.cmake
index 95ed72e53..9f2632736 100644
--- a/cmake/Modules/CheckLibcxxAtomic.cmake
+++ b/cmake/Modules/CheckLibcxxAtomic.cmake
@@ -33,9 +33,9 @@ if(NOT LIBCXX_HAVE_CXX_ATOMICS_WITHOUT_LIB)
     list(APPEND CMAKE_REQUIRED_LIBRARIES "atomic")
     check_cxx_atomics(LIBCXX_HAVE_CXX_ATOMICS_WITH_LIB)
     if (NOT LIBCXX_HAVE_CXX_ATOMICS_WITH_LIB)
-      message(FATAL_ERROR "Host compiler must support std::atomic!")
+      message(WARNING "Host compiler must support std::atomic!")
     endif()
   else()
-    message(FATAL_ERROR "Host compiler appears to require libatomic, but cannot find it.")
+    message(WARNING "Host compiler appears to require libatomic, but cannot find it.")
   endif()
 endif()