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-rw-r--r--contrib/llvm-project/libcxx/include/__mutex_base1
1 files changed, 1 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/__mutex_base b/contrib/llvm-project/libcxx/include/__mutex_base
index 21e2075603b5..8d8c8af7070c 100644
--- a/contrib/llvm-project/libcxx/include/__mutex_base
+++ b/contrib/llvm-project/libcxx/include/__mutex_base
@@ -13,6 +13,7 @@
#include <__config>
#include <__threading_support>
#include <chrono>
+#include <ratio>
#include <system_error>
#include <time.h>