diff --git a/include/boost/unordered/unordered_map.hpp b/include/boost/unordered/unordered_map.hpp
index f12666c4..51d37e6b 100644
--- a/include/boost/unordered/unordered_map.hpp
+++ b/include/boost/unordered/unordered_map.hpp
@@ -682,7 +682,7 @@ template <class K, class T, class H, class P, class A> class unordered_map
     //    value_allocator_traits::is_always_equal::value &&
     //    is_nothrow_move_assignable_v<H> &&
     //    is_nothrow_move_assignable_v<P>)
-    void clear();
+    void clear() BOOST_NOEXCEPT;
 
     template <typename H2, typename P2>
     void merge(boost::unordered_map<K, T, H2, P2, A>& source);
@@ -1188,7 +1188,7 @@ template <class K, class T, class H, class P, class A> class unordered_multimap
     //    value_allocator_traits::is_always_equal::value &&
     //    is_nothrow_move_assignable_v<H> &&
     //    is_nothrow_move_assignable_v<P>)
-    void clear();
+    void clear() BOOST_NOEXCEPT;
 
     template <typename H2, typename P2>
     void merge(boost::unordered_multimap<K, T, H2, P2, A>& source);
@@ -1504,7 +1504,7 @@ void unordered_map<K, T, H, P, A>::swap(unordered_map& other)
 }
 
 template <class K, class T, class H, class P, class A>
-void unordered_map<K, T, H, P, A>::clear()
+void unordered_map<K, T, H, P, A>::clear() BOOST_NOEXCEPT
 {
     table_.clear();
 }
@@ -1927,7 +1927,7 @@ void unordered_multimap<K, T, H, P, A>::swap(unordered_multimap& other)
 }
 
 template <class K, class T, class H, class P, class A>
-void unordered_multimap<K, T, H, P, A>::clear()
+void unordered_multimap<K, T, H, P, A>::clear() BOOST_NOEXCEPT
 {
     table_.clear();
 }
diff --git a/include/boost/unordered/unordered_set.hpp b/include/boost/unordered/unordered_set.hpp
index 58731b43..6300d6d3 100644
--- a/include/boost/unordered/unordered_set.hpp
+++ b/include/boost/unordered/unordered_set.hpp
@@ -421,7 +421,7 @@ template <class T, class H, class P, class A> class unordered_set
     //    value_allocator_traits::is_always_equal::value &&
     //    is_nothrow_move_assignable_v<H> &&
     //    is_nothrow_move_assignable_v<P>)
-    void clear();
+    void clear() BOOST_NOEXCEPT;
 
     template <typename H2, typename P2>
     void merge(boost::unordered_set<T, H2, P2, A>& source);
@@ -896,7 +896,7 @@ template <class T, class H, class P, class A> class unordered_multiset
     //    value_allocator_traits::is_always_equal::value &&
     //    is_nothrow_move_assignable_v<H> &&
     //    is_nothrow_move_assignable_v<P>)
-    void clear();
+    void clear() BOOST_NOEXCEPT;
 
     template <typename H2, typename P2>
     void merge(boost::unordered_multiset<T, H2, P2, A>& source);
@@ -1193,13 +1193,13 @@ void unordered_set<T, H, P, A>::swap(unordered_set& other)
 }
 
 template <class T, class H, class P, class A>
-void unordered_set<T, H, P, A>::clear()
+void unordered_set<T, H, P, A>::clear() BOOST_NOEXCEPT
 {
     table_.clear();
 }
 
 template <class T, class H, class P, class A>
-void unordered_multiset<T, H, P, A>::clear()
+void unordered_multiset<T, H, P, A>::clear() BOOST_NOEXCEPT
 {
     table_.clear();
 }
diff --git a/test/unordered/compile_tests.hpp b/test/unordered/compile_tests.hpp
index 45ad2111..c676f2d5 100644
--- a/test/unordered/compile_tests.hpp
+++ b/test/unordered/compile_tests.hpp
@@ -554,6 +554,7 @@ void unordered_test(X& x, Key& k, Hash& hf, Pred& eq)
     const_iterator q1 = a.cbegin(), q2 = a.cend();
     test::check_return_type<iterator>::equals(a.erase(q1, q2));
 
+    TEST_NOEXCEPT_EXPR(a.clear());
     a.clear();
 
     X const b;