diff --git a/include/boost/unordered/detail/foa.hpp b/include/boost/unordered/detail/foa.hpp
index 25d2dd75..d6e18c62 100644
--- a/include/boost/unordered/detail/foa.hpp
+++ b/include/boost/unordered/detail/foa.hpp
@@ -1021,7 +1021,7 @@ private:
 
   static group_type* dummy_groups()noexcept
   {
-    static constexpr group_type::dummy_group_type storage[size_policy::min_size()];
+    static constexpr group_type::dummy_group_type storage[size_policy::min_size()]{};
     return reinterpret_cast<group_type*>(
       const_cast<group_type::dummy_group_type*>(storage));
   }