diff --git a/include/boost/unordered/unordered_flat_set.hpp b/include/boost/unordered/unordered_flat_set.hpp
index b1291caf..413144dd 100644
--- a/include/boost/unordered/unordered_flat_set.hpp
+++ b/include/boost/unordered/unordered_flat_set.hpp
@@ -563,6 +563,21 @@ namespace boost {
       class = boost::enable_if_t<detail::is_allocator_v<Allocator> > >
     unordered_flat_set(std::initializer_list<T>, std::size_t, Hash, Allocator)
       -> unordered_flat_set<T, Hash, std::equal_to<T>, Allocator>;
+
+    template <class InputIterator, class Allocator,
+      class = boost::enable_if_t<detail::is_input_iterator_v<InputIterator> >,
+      class = boost::enable_if_t<detail::is_allocator_v<Allocator> > >
+    unordered_flat_set(InputIterator, InputIterator, Allocator)
+      -> unordered_flat_set<
+        typename std::iterator_traits<InputIterator>::value_type,
+        boost::hash<typename std::iterator_traits<InputIterator>::value_type>,
+        std::equal_to<typename std::iterator_traits<InputIterator>::value_type>,
+        Allocator>;
+
+    template <class T, class Allocator,
+      class = boost::enable_if_t<detail::is_allocator_v<Allocator> > >
+    unordered_flat_set(std::initializer_list<T>, Allocator)
+      -> unordered_flat_set<T, boost::hash<T>, std::equal_to<T>, Allocator>;
 #endif
 
   } // namespace unordered
diff --git a/include/boost/unordered/unordered_set.hpp b/include/boost/unordered/unordered_set.hpp
index 7c8ce72c..a054ed64 100644
--- a/include/boost/unordered/unordered_set.hpp
+++ b/include/boost/unordered/unordered_set.hpp
@@ -673,6 +673,20 @@ namespace boost {
     unordered_set(std::initializer_list<T>, std::size_t, Hash, Allocator)
       -> unordered_set<T, Hash, std::equal_to<T>, Allocator>;
 
+    template <class InputIterator, class Allocator,
+      class = boost::enable_if_t<detail::is_input_iterator_v<InputIterator> >,
+      class = boost::enable_if_t<detail::is_allocator_v<Allocator> > >
+    unordered_set(InputIterator, InputIterator, Allocator)
+      -> unordered_set<typename std::iterator_traits<InputIterator>::value_type,
+        boost::hash<typename std::iterator_traits<InputIterator>::value_type>,
+        std::equal_to<typename std::iterator_traits<InputIterator>::value_type>,
+        Allocator>;
+
+    template <class T, class Allocator,
+      class = boost::enable_if_t<detail::is_allocator_v<Allocator> > >
+    unordered_set(std::initializer_list<T>, Allocator)
+      -> unordered_set<T, boost::hash<T>, std::equal_to<T>, Allocator>;
+
 #endif
 
     template <class T, class H, class P, class A> class unordered_multiset
@@ -1303,6 +1317,21 @@ namespace boost {
     unordered_multiset(std::initializer_list<T>, std::size_t, Hash, Allocator)
       -> unordered_multiset<T, Hash, std::equal_to<T>, Allocator>;
 
+    template <class InputIterator, class Allocator,
+      class = boost::enable_if_t<detail::is_input_iterator_v<InputIterator> >,
+      class = boost::enable_if_t<detail::is_allocator_v<Allocator> > >
+    unordered_multiset(InputIterator, InputIterator, Allocator)
+      -> unordered_multiset<
+        typename std::iterator_traits<InputIterator>::value_type,
+        boost::hash<typename std::iterator_traits<InputIterator>::value_type>,
+        std::equal_to<typename std::iterator_traits<InputIterator>::value_type>,
+        Allocator>;
+
+    template <class T, class Allocator,
+      class = boost::enable_if_t<detail::is_allocator_v<Allocator> > >
+    unordered_multiset(std::initializer_list<T>, Allocator)
+      -> unordered_multiset<T, boost::hash<T>, std::equal_to<T>, Allocator>;
+
 #endif
 
     ////////////////////////////////////////////////////////////////////////////
diff --git a/test/unordered/deduction_tests.cpp b/test/unordered/deduction_tests.cpp
index c979937f..7c942186 100644
--- a/test/unordered/deduction_tests.cpp
+++ b/test/unordered/deduction_tests.cpp
@@ -269,14 +269,14 @@ template <template <class...> class UnorderedSet> void set_tests()
   test_allocator<int> int_allocator;
 
   /*   template<class InputIt,
-            class Hash = std::hash<typename
-    std::iterator_traits<InputIt>::value_type>, class Pred =
+           class Hash = std::hash<typename
+  std::iterator_traits<InputIt>::value_type>, class Pred =
     std::equal_to<typename std::iterator_traits<InputIt>::value_type>, class
     Alloc = std::allocator<typename std::iterator_traits<InputIt>::value_type>>
-    unordered_set(InputIt, InputIt,
+  unordered_set(InputIt, InputIt,
             typename see below ::size_type = see below,
-            Hash = Hash(), Pred = Pred(), Alloc = Alloc())
-      -> unordered_set<typename std::iterator_traits<InputIt>::value_type, Hash,
+           Hash = Hash(), Pred = Pred(), Alloc = Alloc())
+    -> unordered_set<typename std::iterator_traits<InputIt>::value_type, Hash,
     Pred, Alloc>; */
 
   {
@@ -390,6 +390,35 @@ template <template <class...> class UnorderedSet> void set_tests()
     BOOST_TEST_TRAIT_SAME(decltype(s),
       UnorderedSet<int, hash_equals, std::equal_to<int>, test_allocator<int> >);
   }
+
+  /*
+    template<class InputIterator, class Allocator>
+      unordered_set(InputIterator, InputIterator, Allocator)
+        -> unordered_set<iter-value-type<InputIterator>,
+                         hash<iter-value-type<InputIterator>>,
+                         equal_to<iter-value-type<InputIterator>>,
+                         Allocator>;
+   */
+
+  {
+    UnorderedSet s(y.begin(), y.end(), int_allocator);
+    BOOST_TEST_TRAIT_SAME(
+      decltype(s), UnorderedSet<int, boost::hash<int>, std::equal_to<int>,
+                     test_allocator<int> >);
+  }
+
+  /*
+  template<class T, class Allocator>
+    unordered_set(initializer_list<T>, Allocator)
+      -> unordered_set<T, hash<T>, equal_to<T>, Allocator>;
+ */
+
+  {
+    UnorderedSet s({1, 2}, int_allocator);
+    BOOST_TEST_TRAIT_SAME(
+      decltype(s), UnorderedSet<int, boost::hash<int>, std::equal_to<int>,
+                     test_allocator<int> >);
+  }
 }
 
 #endif