diff --git a/include/boost/unordered/detail/foa/concurrent_table.hpp b/include/boost/unordered/detail/foa/concurrent_table.hpp
index e61b8fc9..bcece6af 100644
--- a/include/boost/unordered/detail/foa/concurrent_table.hpp
+++ b/include/boost/unordered/detail/foa/concurrent_table.hpp
@@ -174,7 +174,7 @@ struct group_access
 
 private:
   mutex_type          m;
-  insert_counter_type cnt=0;
+  insert_counter_type cnt{0};
 };
 
 template<std::size_t Size>