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-rw-r--r--include/unordered_set2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/unordered_set b/include/unordered_set
index fd378fa07145..d06629fdcd47 100644
--- a/include/unordered_set
+++ b/include/unordered_set
@@ -325,6 +325,8 @@ template <class Value, class Hash, class Pred, class Alloc>
#include <__hash_table>
#include <functional>
+#include <__debug>
+
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif