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-rw-r--r--libcxx/src/ios.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/libcxx/src/ios.cpp b/libcxx/src/ios.cpp
index 0bd500bf3c2..06426c7b604 100644
--- a/libcxx/src/ios.cpp
+++ b/libcxx/src/ios.cpp
@@ -148,7 +148,7 @@ ios_base::getloc() const
}
// xalloc
-#if __has_feature(cxx_atomic) && !_LIBCPP_HAS_NO_THREADS
+#if __has_feature(cxx_atomic) && !defined(_LIBCPP_HAS_NO_THREADS)
atomic<int> ios_base::__xindex_ = ATOMIC_VAR_INIT(0);
#else
int ios_base::__xindex_ = 0;
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